Mathway | Problèmes fréquents

Problèmes fréquents

Rang	Matière	Problème	Problème de formatage
701	Multiplier les matrices	[[-1,0,0],[0,2,0],[0,0,3]][[-1,0,0],[0,2,0],[0,0,3]]	$[\begin{array}{c} - 1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 3 \end{array}] [\begin{array}{c} - 1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 3 \end{array}]$
702	Multiplier les matrices	[[1,0,0],[2,1,0],[-4,0,1]][[1,-2,5],[0,1,3],[0,5,-12]]	$[\begin{array}{c} 1 & 0 & 0 \\ 2 & 1 & 0 \\ - 4 & 0 & 1 \end{array}] [\begin{array}{c} 1 & - 2 & 5 \\ 0 & 1 & 3 \\ 0 & 5 & - 12 \end{array}]$
703	Multiplier les matrices	[[1,0,0],[2,1,0],[4,0,1]][[1,-2,5],[0,1,3],[0,5,-12]]	$[\begin{array}{c} 1 & 0 & 0 \\ 2 & 1 & 0 \\ 4 & 0 & 1 \end{array}] [\begin{array}{c} 1 & - 2 & 5 \\ 0 & 1 & 3 \\ 0 & 5 & - 12 \end{array}]$
704	Multiplier les matrices	[[1,0,0],[-3,1,0],[2,1,1],[0,-2,1]]*[[3,1,-1],[0,-1,-1],[0,0,-1]]	$[\begin{array}{c} 1 & 0 & 0 \\ - 3 & 1 & 0 \\ 2 & 1 & 1 \\ 0 & - 2 & 1 \end{array}] \cdot [\begin{array}{c} 3 & 1 & - 1 \\ 0 & - 1 & - 1 \\ 0 & 0 & - 1 \end{array}]$
705	Multiplier les matrices	[[1,0,-1],[-4/3,2/3,1],[-1/3,-1/3,1]][[2770],[1330],[1925]]	$[\begin{array}{c} 1 & 0 & - 1 \\ - \frac{4}{3} & \frac{2}{3} & 1 \\ - \frac{1}{3} & - \frac{1}{3} & 1 \end{array}] [\begin{array}{c} 2770 \\ 1330 \\ 1925 \end{array}]$
706	Multiplier les matrices	[[1,0,1],[0,1,0]][[1],[2],[3]]	$[\begin{array}{c} 1 & 0 & 1 \\ 0 & 1 & 0 \end{array}] [\begin{array}{c} 1 \\ 2 \\ 3 \end{array}]$
707	Multiplier les matrices	[[1,0,1],[0,1,1],[0,0,1]][[1,1,2],[1,2,3],[3,4,7]][[1,1,0],[1,2,0],[3,4,1]]	$[\begin{array}{c} 1 & 0 & 1 \\ 0 & 1 & 1 \\ 0 & 0 & 1 \end{array}] [\begin{array}{c} 1 & 1 & 2 \\ 1 & 2 & 3 \\ 3 & 4 & 7 \end{array}] [\begin{array}{c} 1 & 1 & 0 \\ 1 & 2 & 0 \\ 3 & 4 & 1 \end{array}]$
708	Multiplier les matrices	[[1,0,1],[-1,2,0],[0,1,1]][[-1,-1,0],[1,-1,1],[1,1,1]]	$[\begin{array}{c} 1 & 0 & 1 \\ - 1 & 2 & 0 \\ 0 & 1 & 1 \end{array}] [\begin{array}{c} - 1 & - 1 & 0 \\ 1 & - 1 & 1 \\ 1 & 1 & 1 \end{array}]$
709	Multiplier les matrices	[[-1,0,-2],[2,5,-4],[0,2,-2]][[-1],[5],[2]]	$[\begin{array}{c} - 1 & 0 & - 2 \\ 2 & 5 & - 4 \\ 0 & 2 & - 2 \end{array}] [\begin{array}{c} - 1 \\ 5 \\ 2 \end{array}]$
710	Multiplier les matrices	[[1,0,3],[2,-1,-2]]*[[-2,4,2],[1,0,0],[-1,1,1]]	$[\begin{array}{c} 1 & 0 & 3 \\ 2 & - 1 & - 2 \end{array}] \cdot [\begin{array}{c} - 2 & 4 & 2 \\ 1 & 0 & 0 \\ - 1 & 1 & 1 \end{array}]$
711	Multiplier les matrices	[[1,0,3],[2,-1,-2]][[-2,4,2],[1,0,0],[-1,1,1]]	$[\begin{array}{c} 1 & 0 & 3 \\ 2 & - 1 & - 2 \end{array}] [\begin{array}{c} - 2 & 4 & 2 \\ 1 & 0 & 0 \\ - 1 & 1 & 1 \end{array}]$
712	Multiplier les matrices	[[-1,0,-3],[-3,-2,-13],[2,3,12]][[a],[b],[c]]	$[\begin{array}{c} - 1 & 0 & - 3 \\ - 3 & - 2 & - 13 \\ 2 & 3 & 12 \end{array}] [\begin{array}{c} a \\ b \\ c \end{array}]$
713	Multiplier les matrices	[[1,0,-3],[4,-4,3]]*[[1,2],[-2,1]]	$[\begin{array}{c} 1 & 0 & - 3 \\ 4 & - 4 & 3 \end{array}] \cdot [\begin{array}{c} 1 & 2 \\ - 2 & 1 \end{array}]$
714	Multiplier les matrices	[[1,0,4],[2,2,-3],[3,1,0]]*[[7,0,-3],[-1,1,2],[0,3,1]]	$[\begin{array}{c} 1 & 0 & 4 \\ 2 & 2 & - 3 \\ 3 & 1 & 0 \end{array}] \cdot [\begin{array}{c} 7 & 0 & - 3 \\ - 1 & 1 & 2 \\ 0 & 3 & 1 \end{array}]$
715	Multiplier les matrices	[[1,0,4],[3,0,-3],[0,1,1]][[2],[1],[0]]	$[\begin{array}{c} 1 & 0 & 4 \\ 3 & 0 & - 3 \\ 0 & 1 & 1 \end{array}] [\begin{array}{c} 2 \\ 1 \\ 0 \end{array}]$
716	Multiplier les matrices	[[-1,0,4],[5,-2,0]]*[[2,-1],[3,6]]	$[\begin{array}{c} - 1 & 0 & 4 \\ 5 & - 2 & 0 \end{array}] \cdot [\begin{array}{c} 2 & - 1 \\ 3 & 6 \end{array}]$
717	Multiplier les matrices	[[1,0],[0,0],[0,1]]*[[-3,4],[5,-2]]	$[\begin{array}{c} 1 & 0 \\ 0 & 0 \\ 0 & 1 \end{array}] \cdot [\begin{array}{c} - 3 & 4 \\ 5 & - 2 \end{array}]$
718	Multiplier les matrices	[[-1,0],[0,-1]]*[[0,1,1,0],[0,0,1,1]]	$[\begin{array}{c} - 1 & 0 \\ 0 & - 1 \end{array}] \cdot [\begin{array}{c} 0 & 1 & 1 & 0 \\ 0 & 0 & 1 & 1 \end{array}]$
719	Multiplier les matrices	[[1,0],[0,1]]*[[-1,0,3],[5,7,2]]	$[\begin{array}{c} 1 & 0 \\ 0 & 1 \end{array}] \cdot [\begin{array}{c} - 1 & 0 & 3 \\ 5 & 7 & 2 \end{array}]$
720	Multiplier les matrices	[[1,0],[0,1]][[0,1],[1,0]]	$[\begin{array}{c} 1 & 0 \\ 0 & 1 \end{array}] [\begin{array}{c} 0 & 1 \\ 1 & 0 \end{array}]$
721	Multiplier les matrices	[[-1,0],[0,-1]][[-1,0],[0,-1]]	$[\begin{array}{c} - 1 & 0 \\ 0 & - 1 \end{array}] [\begin{array}{c} - 1 & 0 \\ 0 & - 1 \end{array}]$
722	Multiplier les matrices	[[1,0],[0,1]][[2,0],[0,2]]	$[\begin{array}{c} 1 & 0 \\ 0 & 1 \end{array}] [\begin{array}{c} 2 & 0 \\ 0 & 2 \end{array}]$
723	Multiplier les matrices	[[1,0],[0,1]][[2,2]]	$[\begin{array}{c} 1 & 0 \\ 0 & 1 \end{array}] [\begin{array}{c} 2 & 2 \end{array}]$
724	Multiplier les matrices	[[1,0],[0,3]]-4[[7,0],[0,-1]]	$[\begin{array}{c} 1 & 0 \\ 0 & 3 \end{array}] - 4 [\begin{array}{c} 7 & 0 \\ 0 & - 1 \end{array}]$
725	Multiplier les matrices	[[1,0],[0,3]]*[[1,2,-1],[2,-1,2]]	$[\begin{array}{c} 1 & 0 \\ 0 & 3 \end{array}] \cdot [\begin{array}{c} 1 & 2 & - 1 \\ 2 & - 1 & 2 \end{array}]$
726	Multiplier les matrices	[[1,0],[2,1]][[1/3,0],[0,1]]	$[\begin{array}{c} 1 & 0 \\ 2 & 1 \end{array}] [\begin{array}{c} \frac{1}{3} & 0 \\ 0 & 1 \end{array}]$
727	Multiplier les matrices	[[1,0],[-3,4],[1,2]]*[[4,3],[8,2],[-1,5]]	$[\begin{array}{c} 1 & 0 \\ - 3 & 4 \\ 1 & 2 \end{array}] \cdot [\begin{array}{c} 4 & 3 \\ 8 & 2 \\ - 1 & 5 \end{array}]$
728	Multiplier les matrices	[[1,0],[9,1]]*[[1,0],[0,5]]	$[\begin{array}{c} 1 & 0 \\ 9 & 1 \end{array}] \cdot [\begin{array}{c} 1 & 0 \\ 0 & 5 \end{array}]$
729	Multiplier les matrices	[[1,1,0,0],[0,1,1,0],[0,0,1,1],[0,0,0,1]][[1],[1],[1],[1]]	$[\begin{array}{c} 1 & 1 & 0 & 0 \\ 0 & 1 & 1 & 0 \\ 0 & 0 & 1 & 1 \\ 0 & 0 & 0 & 1 \end{array}] [\begin{array}{c} 1 \\ 1 \\ 1 \\ 1 \end{array}]$
730	Multiplier les matrices	[[-1,1,0],[1,0,0],[0,0,-2]][[0,0,0],[1,0,0],[1,0,-1/2]]	$[\begin{array}{c} - 1 & 1 & 0 \\ 1 & 0 & 0 \\ 0 & 0 & - 2 \end{array}] [\begin{array}{c} 0 & 0 & 0 \\ 1 & 0 & 0 \\ 1 & 0 & - \frac{1}{2} \end{array}]$
731	Multiplier les matrices	[[-1,1,0],[1,0,0],[0,0,-2]][[0,1,0],[1,1,0],[0,0,-1/2]]	$[\begin{array}{c} - 1 & 1 & 0 \\ 1 & 0 & 0 \\ 0 & 0 & - 2 \end{array}] [\begin{array}{c} 0 & 1 & 0 \\ 1 & 1 & 0 \\ 0 & 0 & - \frac{1}{2} \end{array}]$
732	Multiplier les matrices	[[-1,1,0],[1,0,0],[0,0,-2]][[-1,0,0],[0,0,0],[0,1,-1/2]]	$[\begin{array}{c} - 1 & 1 & 0 \\ 1 & 0 & 0 \\ 0 & 0 & - 2 \end{array}] [\begin{array}{c} - 1 & 0 & 0 \\ 0 & 0 & 0 \\ 0 & 1 & - \frac{1}{2} \end{array}]$
733	Multiplier les matrices	[[1,1,0],[1,0,2],[0,2,-1]][[2],[2],[k]]	$[\begin{array}{c} 1 & 1 & 0 \\ 1 & 0 & 2 \\ 0 & 2 & - 1 \end{array}] [\begin{array}{c} 2 \\ 2 \\ k \end{array}]$
734	Multiplier les matrices	[[-1,1,0],[2,3,-1],[1,1,2]][[-1],[2],[1]]	$[\begin{array}{c} - 1 & 1 & 0 \\ 2 & 3 & - 1 \\ 1 & 1 & 2 \end{array}] [\begin{array}{c} - 1 \\ 2 \\ 1 \end{array}]$
735	Multiplier les matrices	[[1,1,1]]*[[1,-1,1],[-1,2,-1],[0,1,-1]]	$[\begin{array}{c} 1 & 1 & 1 \end{array}] \cdot [\begin{array}{c} 1 & - 1 & 1 \\ - 1 & 2 & - 1 \\ 0 & 1 & - 1 \end{array}]$
736	Multiplier les matrices	[[1,-1,-1],[-1/2,0,1],[-1/2,1,1]][[-4,6,6],[-2,2,4],[-1,3,1]]	$[\begin{array}{c} 1 & - 1 & - 1 \\ - \frac{1}{2} & 0 & 1 \\ - \frac{1}{2} & 1 & 1 \end{array}] [\begin{array}{c} - 4 & 6 & 6 \\ - 2 & 2 & 4 \\ - 1 & 3 & 1 \end{array}]$
737	Multiplier les matrices	[[-1,1,1],[1,0,-2],[-1,2,2]][[2,0,2],[0,-1,1],[1,1,1]]	$[\begin{array}{c} - 1 & 1 & 1 \\ 1 & 0 & - 2 \\ - 1 & 2 & 2 \end{array}] [\begin{array}{c} 2 & 0 & 2 \\ 0 & - 1 & 1 \\ 1 & 1 & 1 \end{array}]$
738	Multiplier les matrices	[[1,1,1],[1,2,1],[-1,-1,0]][[1,1,1],[1,2,1],[-1,-1,0]]	$[\begin{array}{c} 1 & 1 & 1 \\ 1 & 2 & 1 \\ - 1 & - 1 & 0 \end{array}] [\begin{array}{c} 1 & 1 & 1 \\ 1 & 2 & 1 \\ - 1 & - 1 & 0 \end{array}]$
739	Multiplier les matrices	[[1,1,1],[3,6,-1],[4,8,3]][[1],[2],[3]]	$[\begin{array}{c} 1 & 1 & 1 \\ 3 & 6 & - 1 \\ 4 & 8 & 3 \end{array}] [\begin{array}{c} 1 \\ 2 \\ 3 \end{array}]$
740	Multiplier les matrices	[[1,1,1],[6,6.25,6.50]][[1,6],[1,6.25],[1,6.50]]	$[\begin{array}{c} 1 & 1 & 1 \\ 6 & 6.25 & 6.5 \end{array}] [\begin{array}{c} 1 & 6 \\ 1 & 6.25 \\ 1 & 6.5 \end{array}]$
741	Multiplier les matrices	[[-1,1,2],[0,-1,3]][[1,3],[2,6]]	$[\begin{array}{c} - 1 & 1 & 2 \\ 0 & - 1 & 3 \end{array}] [\begin{array}{c} 1 & 3 \\ 2 & 6 \end{array}]$
742	Multiplier les matrices	[[-1,1,2],[0,-1,3]][[6,-3],[-2,1]]	$[\begin{array}{c} - 1 & 1 & 2 \\ 0 & - 1 & 3 \end{array}] [\begin{array}{c} 6 & - 3 \\ - 2 & 1 \end{array}]$
743	Multiplier les matrices	[[1,-1,2],[0,3,4]][[4,0,-3],[-1,-2,3]]	$[\begin{array}{c} 1 & - 1 & 2 \\ 0 & 3 & 4 \end{array}] [\begin{array}{c} 4 & 0 & - 3 \\ - 1 & - 2 & 3 \end{array}]$
744	Multiplier les matrices	[[1,1,2],[1,-1,1],[1,-1,2]]*[[2,-3,0],[-1,2,1],[-1,2,0]]	$[\begin{array}{c} 1 & 1 & 2 \\ 1 & - 1 & 1 \\ 1 & - 1 & 2 \end{array}] \cdot [\begin{array}{c} 2 & - 3 & 0 \\ - 1 & 2 & 1 \\ - 1 & 2 & 0 \end{array}]$
745	Multiplier les matrices	[[-1,1,-3],[-9,8,7],[-8,-2,-2]][[1,0,0],[0,1,0],[0,0,1]]	$[\begin{array}{c} - 1 & 1 & - 3 \\ - 9 & 8 & 7 \\ - 8 & - 2 & - 2 \end{array}] [\begin{array}{c} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array}]$
746	Multiplier les matrices	[[1,1]]*[[1,0,1],[3,-1,1]]	$[\begin{array}{c} 1 & 1 \end{array}] \cdot [\begin{array}{c} 1 & 0 & 1 \\ 3 & - 1 & 1 \end{array}]$
747	Multiplier les matrices	[[1,1]]*[[1,1],[1,2]]	$[\begin{array}{c} 1 & 1 \end{array}] \cdot [\begin{array}{c} 1 & 1 \\ 1 & 2 \end{array}]$
748	Multiplier les matrices	[[1,1],[0,0]][[1,1],[0,0]]	$[\begin{array}{c} 1 & 1 \\ 0 & 0 \end{array}] [\begin{array}{c} 1 & 1 \\ 0 & 0 \end{array}]$
749	Multiplier les matrices	[[-1,1],[0,1]][[1],[4]]	$[\begin{array}{c} - 1 & 1 \\ 0 & 1 \end{array}] [\begin{array}{c} 1 \\ 4 \end{array}]$
750	Multiplier les matrices	[[1,-1],[0,1]][[3,2],[-5,8]]	$[\begin{array}{c} 1 & - 1 \\ 0 & 1 \end{array}] [\begin{array}{c} 3 & 2 \\ - 5 & 8 \end{array}]$
751	Multiplier les matrices	[[-1,1],[1,-2/3]]*[[6],[12]]	$[\begin{array}{c} - 1 & 1 \\ 1 & - \frac{2}{3} \end{array}] \cdot [\begin{array}{c} 6 \\ 12 \end{array}]$
752	Multiplier les matrices	[[-1,1],[1,0]][[1,2],[1,0]]	$[\begin{array}{c} - 1 & 1 \\ 1 & 0 \end{array}] [\begin{array}{c} 1 & 2 \\ 1 & 0 \end{array}]$
753	Multiplier les matrices	[[1,-1],[1,1]][[x,y],[z,w]]	$[\begin{array}{c} 1 & - 1 \\ 1 & 1 \end{array}] [\begin{array}{c} x & y \\ z & w \end{array}]$
754	Multiplier les matrices	[[1,1],[1,2],[1,-1]][[27/7],[-9/7]]	$[\begin{array}{c} 1 & 1 \\ 1 & 2 \\ 1 & - 1 \end{array}] [\begin{array}{c} \frac{27}{7} \\ - \frac{9}{7} \end{array}]$
755	Multiplier les matrices	[[1,1],[1,6]][[1,3],[-5,-2]]	$[\begin{array}{c} 1 & 1 \\ 1 & 6 \end{array}] [\begin{array}{c} 1 & 3 \\ - 5 & - 2 \end{array}]$
756	Multiplier les matrices	[[1,1],[2,1]]*[[1],[1]]	$[\begin{array}{c} 1 & 1 \\ 2 & 1 \end{array}] \cdot [\begin{array}{c} 1 \\ 1 \end{array}]$
757	Multiplier les matrices	[[1,1],[2,3]][[3,-1],[-2,1]]	$[\begin{array}{c} 1 & 1 \\ 2 & 3 \end{array}] [\begin{array}{c} 3 & - 1 \\ - 2 & 1 \end{array}]$
758	Multiplier les matrices	[[1,1],[-2,4]][[1/2,1/2],[-1,2]]	$[\begin{array}{c} 1 & 1 \\ - 2 & 4 \end{array}] [\begin{array}{c} \frac{1}{2} & \frac{1}{2} \\ - 1 & 2 \end{array}]$
759	Multiplier les matrices	[[-1,1],[4,2]]*[[1,2],[3,6]]	$[\begin{array}{c} - 1 & 1 \\ 4 & 2 \end{array}] \cdot [\begin{array}{c} 1 & 2 \\ 3 & 6 \end{array}]$
760	Multiplier les matrices	[[1,1],[-5,5]][[-3,-5],[1,-2]]	$[\begin{array}{c} 1 & 1 \\ - 5 & 5 \end{array}] [\begin{array}{c} - 3 & - 5 \\ 1 & - 2 \end{array}]$
761	Multiplier les matrices	[[1,2,0,4],[3,-1,0,0],[0,0,1,7]][[5,2,6],[2,3,1],[6,1,-2]]	$[\begin{array}{c} 1 & 2 & 0 & 4 \\ 3 & - 1 & 0 & 0 \\ 0 & 0 & 1 & 7 \end{array}] [\begin{array}{c} 5 & 2 & 6 \\ 2 & 3 & 1 \\ 6 & 1 & - 2 \end{array}]$
762	Multiplier les matrices	[[1,2,0],[0,1,1],[-1,-2,3]][[2,0,4],[1,1,0],[-1,3,2]]	$[\begin{array}{c} 1 & 2 & 0 \\ 0 & 1 & 1 \\ - 1 & - 2 & 3 \end{array}] [\begin{array}{c} 2 & 0 & 4 \\ 1 & 1 & 0 \\ - 1 & 3 & 2 \end{array}]$
763	Multiplier les matrices	[[1,2,0],[0,-1,7],[2,-3,-1]][[2,0,5],[0,2,0],[3,1,5]]	$[\begin{array}{c} 1 & 2 & 0 \\ 0 & - 1 & 7 \\ 2 & - 3 & - 1 \end{array}] [\begin{array}{c} 2 & 0 & 5 \\ 0 & 2 & 0 \\ 3 & 1 & 5 \end{array}]$
764	Multiplier les matrices	[[1,2,0],[0,2,1]][[1,2],[1,0],[2,0]]	$[\begin{array}{c} 1 & 2 & 0 \\ 0 & 2 & 1 \end{array}] [\begin{array}{c} 1 & 2 \\ 1 & 0 \\ 2 & 0 \end{array}]$
765	Multiplier les matrices	[[1,2,0],[1,2,1],[0,0,1]][[13],[15],[2]]	$[\begin{array}{c} 1 & 2 & 0 \\ 1 & 2 & 1 \\ 0 & 0 & 1 \end{array}] [\begin{array}{c} 13 \\ 15 \\ 2 \end{array}]$
766	Multiplier les matrices	[[-1,2,1],[0,1,2],[0,4,3]]*[[1,2,-3],[0,1,2],[-1,2,0]]	$[\begin{array}{c} - 1 & 2 & 1 \\ 0 & 1 & 2 \\ 0 & 4 & 3 \end{array}] \cdot [\begin{array}{c} 1 & 2 & - 3 \\ 0 & 1 & 2 \\ - 1 & 2 & 0 \end{array}]$
767	Multiplier les matrices	[[1,2,1],[0,1,2],[0,4,3]]*[[1,2,-3],[0,1,2],[-1,2,0]]	$[\begin{array}{c} 1 & 2 & 1 \\ 0 & 1 & 2 \\ 0 & 4 & 3 \end{array}] \cdot [\begin{array}{c} 1 & 2 & - 3 \\ 0 & 1 & 2 \\ - 1 & 2 & 0 \end{array}]$
768	Multiplier les matrices	[[1,-2,1],[1,1,0],[2,-2,-5]][[1],[3],[1]]	$[\begin{array}{c} 1 & - 2 & 1 \\ 1 & 1 & 0 \\ 2 & - 2 & - 5 \end{array}] [\begin{array}{c} 1 \\ 3 \\ 1 \end{array}]$
769	Multiplier les matrices	[[1,2,-1],[1,1,-1],[1,3,0]][[6,-2,-2],[3,1,-2],[2,-2,2]]	$[\begin{array}{c} 1 & 2 & - 1 \\ 1 & 1 & - 1 \\ 1 & 3 & 0 \end{array}] [\begin{array}{c} 6 & - 2 & - 2 \\ 3 & 1 & - 2 \\ 2 & - 2 & 2 \end{array}]$
770	Multiplier les matrices	[[1,2,-1],[1,3,2]]*[[1,2,-4],[7,3,6],[1,1,-1]]	$[\begin{array}{c} 1 & 2 & - 1 \\ 1 & 3 & 2 \end{array}] \cdot [\begin{array}{c} 1 & 2 & - 4 \\ 7 & 3 & 6 \\ 1 & 1 & - 1 \end{array}]$
771	Multiplier les matrices	[[1,2,-1],[2,3,-2],[-1,3,3]][[7],[9],[6]]	$[\begin{array}{c} 1 & 2 & - 1 \\ 2 & 3 & - 2 \\ - 1 & 3 & 3 \end{array}] [\begin{array}{c} 7 \\ 9 \\ 6 \end{array}]$
772	Multiplier les matrices	[[1,2,3]][[3,5],[4,6]]	$[\begin{array}{c} 1 & 2 & 3 \end{array}] [\begin{array}{c} 3 & 5 \\ 4 & 6 \end{array}]$
773	Multiplier les matrices	[[1,2,-3],[1,0,1],[-2,-1,0]][[1,1,0],[2,1,0],[3,0,1]]	$[\begin{array}{c} 1 & 2 & - 3 \\ 1 & 0 & 1 \\ - 2 & - 1 & 0 \end{array}] [\begin{array}{c} 1 & 1 & 0 \\ 2 & 1 & 0 \\ 3 & 0 & 1 \end{array}]$
774	Multiplier les matrices	[[1,2,3],[2,1,0]][[1,0],[2,1],[3,2]]	$[\begin{array}{c} 1 & 2 & 3 \\ 2 & 1 & 0 \end{array}] [\begin{array}{c} 1 & 0 \\ 2 & 1 \\ 3 & 2 \end{array}]$
775	Multiplier les matrices	[[1,2,3],[2,2,1],[3,4,3]]*[[-6],[6.5],[-2]]	$[\begin{array}{c} 1 & 2 & 3 \\ 2 & 2 & 1 \\ 3 & 4 & 3 \end{array}] \cdot [\begin{array}{c} - 6 \\ 6.5 \\ - 2 \end{array}]$
776	Multiplier les matrices	[[1,2,3],[x,y,z]][[3,z],[2,y],[1,x]]	$[\begin{array}{c} 1 & 2 & 3 \\ x & y & z \end{array}] [\begin{array}{c} 3 & z \\ 2 & y \\ 1 & x \end{array}]$
777	Multiplier les matrices	[[1,2,3y],[4z,7x+y,y+2x]]*[[7,6],[5,4],[3,2]]	$[\begin{array}{c} 1 & 2 & 3 y \\ 4 z & 7 x + y & y + 2 x \end{array}] \cdot [\begin{array}{c} 7 & 6 \\ 5 & 4 \\ 3 & 2 \end{array}]$
778	Multiplier les matrices	[[1,2,4],[-1,3,5]]*[[1,-1],[2,3],[4,5]]	$[\begin{array}{c} 1 & 2 & 4 \\ - 1 & 3 & 5 \end{array}] \cdot [\begin{array}{c} 1 & - 1 \\ 2 & 3 \\ 4 & 5 \end{array}]$
779	Multiplier les matrices	[[1,-2,4],[5,-5,3],[4,5,-5]][[2,2,5],[4,3,4],[1,-2,3]]	$[\begin{array}{c} 1 & - 2 & 4 \\ 5 & - 5 & 3 \\ 4 & 5 & - 5 \end{array}] [\begin{array}{c} 2 & 2 & 5 \\ 4 & 3 & 4 \\ 1 & - 2 & 3 \end{array}]$
780	Multiplier les matrices	[[1,2,5],[2,4,7],[5,7,6]][[4,0,0],[0,3,0],[0,0,2]]	$[\begin{array}{c} 1 & 2 & 5 \\ 2 & 4 & 7 \\ 5 & 7 & 6 \end{array}] [\begin{array}{c} 4 & 0 & 0 \\ 0 & 3 & 0 \\ 0 & 0 & 2 \end{array}]$
781	Multiplier les matrices	2[[4],[3]][[1,2,3],[4,5,6],[7,8,9]]	$2 [\begin{array}{c} 4 \\ 3 \end{array}] [\begin{array}{c} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{array}]$
782	Multiplier les matrices	3B[[6,9,0,1],[8,2,9,0],[7,8,3,5]]	$3 B [\begin{array}{c} 6 & 9 & 0 & 1 \\ 8 & 2 & 9 & 0 \\ 7 & 8 & 3 & 5 \end{array}]$
783	Multiplier les matrices	-3[[1,3,5],[2,1,4]][[-5],[4],[-3]]	$- 3 [\begin{array}{c} 1 & 3 & 5 \\ 2 & 1 & 4 \end{array}] [\begin{array}{c} - 5 \\ 4 \\ - 3 \end{array}]$
784	Multiplier les matrices	3[[4],[-2]]	$3 [\begin{array}{c} 4 \\ - 2 \end{array}]$
785	Multiplier les matrices	-3[[6],[2],[9]]	$- 3 [\begin{array}{c} 6 \\ 2 \\ 9 \end{array}]$
786	Multiplier les matrices	4*[[-4],[4]]	$4 \cdot [\begin{array}{c} - 4 \\ 4 \end{array}]$
787	Multiplier les matrices	-4[[17,9],[5,-5],[-17,-10]]	$- 4 [\begin{array}{c} 17 & 9 \\ 5 & - 5 \\ - 17 & - 10 \end{array}]$
788	Multiplier les matrices	4[[4],[5]]	$4 [\begin{array}{c} 4 \\ 5 \end{array}]$
789	Multiplier les matrices	-5*[[-1],[1],[1],[1]]	$- 5 \cdot [\begin{array}{c} - 1 \\ 1 \\ 1 \\ 1 \end{array}]$
790	Multiplier les matrices	5[[-7,3,0,9],[4,-5,6,2]]	$5 [\begin{array}{c} - 7 & 3 & 0 & 9 \\ 4 & - 5 & 6 & 2 \end{array}]$
791	Multiplier les matrices	6[[1,1,1,1,0,0,12],[2,1,3,0,1,0,18],[-1,-2,-3,0,0,1,0]]	$6 [\begin{array}{c} 1 & 1 & 1 & 1 & 0 & 0 & 12 \\ 2 & 1 & 3 & 0 & 1 & 0 & 18 \\ - 1 & - 2 & - 3 & 0 & 0 & 1 & 0 \end{array}]$
792	Multiplier les matrices	-8[[9,-6],[-4,0]]	$- 8 [\begin{array}{c} 9 & - 6 \\ - 4 & 0 \end{array}]$
793	Multiplier les matrices	a=[[0,4],[0,8]]	$a = [\begin{array}{c} 0 & 4 \\ 0 & 8 \end{array}]$
794	Multiplier les matrices	a[[1,4,2]][[5],[6],[6]]	$a [\begin{array}{c} 1 & 4 & 2 \end{array}] [\begin{array}{c} 5 \\ 6 \\ 6 \end{array}]$
795	Multiplier les matrices	A[[2,4,3],[1,3,1],[5,2,2],[2,4,5],[1,1,1]]*[[2,1,5,2,1],[4,3,2,4,1],[3,1,2,5,1]]	$A [\begin{array}{c} 2 & 4 & 3 \\ 1 & 3 & 1 \\ 5 & 2 & 2 \\ 2 & 4 & 5 \\ 1 & 1 & 1 \end{array}] \cdot [\begin{array}{c} 2 & 1 & 5 & 2 & 1 \\ 4 & 3 & 2 & 4 & 1 \\ 3 & 1 & 2 & 5 & 1 \end{array}]$
796	Multiplier les matrices	A[[5,6],[4,5]]B[[-2],[9]]	$A [\begin{array}{c} 5 & 6 \\ 4 & 5 \end{array}] B [\begin{array}{c} - 2 \\ 9 \end{array}]$
797	Multiplier les matrices	A[[-9,-9],[1,-4],[-2,-3]]	$A [\begin{array}{c} - 9 & - 9 \\ 1 & - 4 \\ - 2 & - 3 \end{array}]$
798	Multiplier les matrices	[[2/3,1/4],[1/3,3/4]][[1950],[2850]]	$[\begin{array}{c} (\frac{2}{3}) & \frac{1}{4} \\ \frac{1}{3} & \frac{3}{4} \end{array}] [\begin{array}{c} 1950 \\ 2850 \end{array}]$
799	Multiplier les matrices	[[0.8,0.3],[0.2,0.7]][[0.6],[0.4]]	$[\begin{array}{c} 0.8 & 0.3 \\ 0.2 & 0.7 \end{array}] [\begin{array}{c} 0.6 \\ 0.4 \end{array}]$
800	Multiplier les matrices	[[( racine carrée de 2)/2],[( racine carrée de 2)/2],[0]][[( racine carrée de 2)/2,( racine carrée de 2)/2,0]]	$[\begin{array}{c} \frac{\sqrt{2}}{2} \\ \frac{\sqrt{2}}{2} \\ 0 \end{array}] [\begin{array}{c} \frac{\sqrt{2}}{2} & \frac{\sqrt{2}}{2} & 0 \end{array}]$