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热门问题

等级	主题	问题	格式化的问题
2801	求出反函数	[[8,13],[10,15]]	$[\begin{array}{c} 8 & 13 \\ 10 & 15 \end{array}]$
2802	求出反函数	[[8,7],[2,2]]	$[\begin{array}{c} 8 & 7 \\ 2 & 2 \end{array}]$
2803	求出反函数	[[a,b],[c,d]]	$[\begin{array}{c} a & b \\ c & d \end{array}]$
2804	求出反函数	[[d,j,n],[g,k,o],[h,l,p]]=7	$[\begin{array}{c} d & j & n \\ g & k & o \\ h & l & p \end{array}] = 7$
2805	求出反函数	[[a-7]]=5	$[\begin{array}{c} a - 7 \end{array}] = 5$
2806	求出反函数	[[cos(0),-sin(0)],[sin(0),cos(0)]]	$[\begin{array}{c} \cos (0) & - \sin (0) \\ \sin (0) & \cos (0) \end{array}]$
2807	求出反函数	[[f,1,0],[1,f,1],[0,1,f]]	$[\begin{array}{c} f & 1 & 0 \\ 1 & f & 1 \\ 0 & 1 & f \end{array}]$
2808	求出反函数	[[x,x-4,-1],[2,-1,x-3],[1,-2,3]]=5x-3	$[\begin{array}{c} x & x - 4 & - 1 \\ 2 & - 1 & x - 3 \\ 1 & - 2 & 3 \end{array}] = 5 x - 3$
2809	求出反函数	[[a,-2b,3d],[4a,b,-d],[2a,-b,3d]]	$[\begin{array}{c} a & - 2 b & 3 d \\ 4 a & b & - d \\ 2 a & - b & 3 d \end{array}]$
2810	求出反函数	p=[[-1,-1],[-2,-1]]	$p = [\begin{array}{c} - 1 & - 1 \\ - 2 & - 1 \end{array}]$
2811	求定义域	2x+3y=2	$2 x + 3 y = 2$
2812	求出反函数	[[2,3,3],[3,2,3],[0,1,4]]	$[\begin{array}{c} 2 & 3 & 3 \\ 3 & 2 & 3 \\ 0 & 1 & 4 \end{array}]$
2813	求解最简化梯阵形式	2x-3i=[[7,4],[6,5]]	$2 x - 3 i = [\begin{array}{c} 7 & 4 \\ 6 & 5 \end{array}]$
2814	求解最简化梯阵形式	[[(x-3y)=10],[(4x+3y)=10]]	$[\begin{array}{c} (x - 3 y) = 10 \\ (4 x + 3 y) = 10 \end{array}]$
2815	求解最简化梯阵形式	[[1/2,-1,-1/3],[3/4,1/2,-1],[1,-4,1]]	$[\begin{array}{c} \frac{1}{2} & - 1 & - \frac{1}{3} \\ \frac{3}{4} & \frac{1}{2} & - 1 \\ 1 & - 4 & 1 \end{array}]$
2816	求解最简化梯阵形式	[[-2/6.5,2/7,0,0],[-6/6.5,-6/7,6/6.5,0],[1.5/6.5,3/7,2.5/6.5,-300]]	$[\begin{array}{c} - \frac{2}{6.5} & \frac{2}{7} & 0 & 0 \\ - \frac{6}{6.5} & - \frac{6}{7} & \frac{6}{6.5} & 0 \\ \frac{1.5}{6.5} & \frac{3}{7} & \frac{2.5}{6.5} & - 300 \end{array}]$
2817	求解最简化梯阵形式	[[-2/6.5,2/7,0,0],[-6/6.5,-6/7,6/6.5,0],[1.5/6.5,3/7,2.5/6.5,400]]	$[\begin{array}{c} - \frac{2}{6.5} & \frac{2}{7} & 0 & 0 \\ - \frac{6}{6.5} & - \frac{6}{7} & \frac{6}{6.5} & 0 \\ \frac{1.5}{6.5} & \frac{3}{7} & \frac{2.5}{6.5} & 400 \end{array}]$
2818	求解最简化梯阵形式	[[0.8,-0.6],[0.6,0.8]]	$[\begin{array}{c} 0.8 & - 0.6 \\ 0.6 & 0.8 \end{array}]$
2819	求解最简化梯阵形式	[[1,0.5,0.33,0.25,1.1],[0.5,0.33,0.25,0.21,1.2],[0.33,0.25,0.2,0.17,1.3],[0.25,0.2,0.17,0.14,1.4]]	$[\begin{array}{c} 1 & 0.5 & 0.33 & 0.25 & 1.1 \\ 0.5 & 0.33 & 0.25 & 0.21 & 1.2 \\ 0.33 & 0.25 & 0.2 & 0.17 & 1.3 \\ 0.25 & 0.2 & 0.17 & 0.14 & 1.4 \end{array}]$
2820	求解最简化梯阵形式	[[1,0,0,0,0,1],[1,-1,1,-1,1,0.5],[1,1,1,1,1,2],[1,2,4,8,16,4],[1,3,9,27,81,8]]	$[\begin{array}{c} 1 & 0 & 0 & 0 & 0 & 1 \\ 1 & - 1 & 1 & - 1 & 1 & 0.5 \\ 1 & 1 & 1 & 1 & 1 & 2 \\ 1 & 2 & 4 & 8 & 16 & 4 \\ 1 & 3 & 9 & 27 & 81 & 8 \end{array}]$
2821	求解最简化梯阵形式	[[1,0,0,3],[0,1,-5,7],[0,0,0,0]]	$[\begin{array}{c} 1 & 0 & 0 & 3 \\ 0 & 1 & - 5 & 7 \\ 0 & 0 & 0 & 0 \end{array}]$
2822	求解最简化梯阵形式	[[1,0,0,7],[0,1,0,6],[0,0,1,7]]	$[\begin{array}{c} 1 & 0 & 0 & 7 \\ 0 & 1 & 0 & 6 \\ 0 & 0 & 1 & 7 \end{array}]$
2823	求解最简化梯阵形式	[[1,0,1,0],[0,1,0,0],[1,0,1,0]]	$[\begin{array}{c} 1 & 0 & 1 & 0 \\ 0 & 1 & 0 & 0 \\ 1 & 0 & 1 & 0 \end{array}]$
2824	求解最简化梯阵形式	[[1,0,1,-1],[2,-1,0,2],[0,1,2,-4],[a,b,c,3]]	$[\begin{array}{c} 1 & 0 & 1 & - 1 \\ 2 & - 1 & 0 & 2 \\ 0 & 1 & 2 & - 4 \\ a & b & c & 3 \end{array}]$
2825	求解最简化梯阵形式	[[1,0,1,9],[0,1,0,8],[0,0,-1,6]]	$[\begin{array}{c} 1 & 0 & 1 & 9 \\ 0 & 1 & 0 & 8 \\ 0 & 0 & - 1 & 6 \end{array}]$
2826	求解最简化梯阵形式	[[1,x,4],[3,6,8]]	$[\begin{array}{c} 1 & x & 4 \\ 3 & 6 & 8 \end{array}]$
2827	求解最简化梯阵形式	[[1.61804,1],[1,0.61804]]	$[\begin{array}{c} 1.61804 & 1 \\ 1 & 0.61804 \end{array}]$
2828	求解最简化梯阵形式	[[1+ 2,0,1],[3, 的平方根 2,-3],[1,0,1+ 的平方根 2]] 的平方根	$[\begin{array}{c} 1 + \sqrt{2} & 0 & 1 \\ 3 & \sqrt{2} & - 3 \\ 1 & 0 & 1 + \sqrt{2} \end{array}]$
2829	求解最简化梯阵形式	[[10,15000],[7,94000],[5,54000]]	$[\begin{array}{c} 10 & 15000 \\ 7 & 94000 \\ 5 & 54000 \end{array}]$
2830	求解最简化梯阵形式	[[1000,5000,10000,99000],[2,1,0,26]]	$[\begin{array}{c} 1000 & 5000 & 10000 & 99000 \\ 2 & 1 & 0 & 26 \end{array}]$
2831	求解最简化梯阵形式	[[-10x-y=3],[-8x+y=15]]	$[\begin{array}{c} - 10 x - y = 3 \\ - 8 x + y = 15 \end{array}]$
2832	求解最简化梯阵形式	[[12,-15,9],[-2,3,4],[8,-10,6]]	$[\begin{array}{c} 12 & - 15 & 9 \\ - 2 & 3 & 4 \\ 8 & - 10 & 6 \end{array}]$
2833	求解最简化梯阵形式	[[18,20]]	$[\begin{array}{c} 18 & 20 \end{array}]$
2834	求解最简化梯阵形式	[[1,7,0],[0,1,8],[0,0,1]]	$[\begin{array}{c} 1 & 7 & 0 \\ 0 & 1 & 8 \\ 0 & 0 & 1 \end{array}]$
2835	求解最简化梯阵形式	[[1,4,-13,-32],[0,1,-4,-6]]	$[\begin{array}{c} 1 & 4 & - 13 & - 32 \\ 0 & 1 & - 4 & - 6 \end{array}]$
2836	求解最简化梯阵形式	[[1,4,15],[6,0,18]]	$[\begin{array}{c} 1 & 4 & 15 \\ 6 & 0 & 18 \end{array}]$
2837	求解最简化梯阵形式	[[1,-4,2],[-2,8,-9],[-1,7,0]]	$[\begin{array}{c} 1 & - 4 & 2 \\ - 2 & 8 & - 9 \\ - 1 & 7 & 0 \end{array}]$
2838	求解最简化梯阵形式	[[1,-4,-6,-1,7,0],[0,0,1,1,-8,0],[0,0,0,0,2,0],[0,0,0,0,0,0]]	$[\begin{array}{c} 1 & - 4 & - 6 & - 1 & 7 & 0 \\ 0 & 0 & 1 & 1 & - 8 & 0 \\ 0 & 0 & 0 & 0 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 \end{array}]$
2839	求解最简化梯阵形式	[[1,-4,9,-7],[-1,2,-4,1],[5,-6,10,7]]	$[\begin{array}{c} 1 & - 4 & 9 & - 7 \\ - 1 & 2 & - 4 & 1 \\ 5 & - 6 & 10 & 7 \end{array}]$
2840	求解最简化梯阵形式	[[1,-5,-6,-1],[-4,13,10,-3]]	$[\begin{array}{c} 1 & - 5 & - 6 & - 1 \\ - 4 & 13 & 10 & - 3 \end{array}]$
2841	求解最简化梯阵形式	[[1,5]]	$[\begin{array}{c} 1 & 5 \end{array}]$
2842	求解最简化梯阵形式	[[1,2,1,3,10],[-1,1,3,-4,-15],[8,7,-4,36,131]]	$[\begin{array}{c} 1 & 2 & 1 & 3 & 10 \\ - 1 & 1 & 3 & - 4 & - 15 \\ 8 & 7 & - 4 & 36 & 131 \end{array}]$
2843	求解最简化梯阵形式	[[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]]	$[\begin{array}{c} 1 & 2 & 3 & 4 \\ 5 & 6 & 7 & 8 \\ 9 & 10 & 11 & 12 \\ 13 & 14 & 15 & 16 \end{array}]$
2844	求解最简化梯阵形式	[[1,2,3],[1,1,2],[2,0,2]]	$[\begin{array}{c} 1 & 2 & 3 \\ 1 & 1 & 2 \\ 2 & 0 & 2 \end{array}]$
2845	求解最简化梯阵形式	[[1,2],[2,4],[3,6]]	$[\begin{array}{c} 1 & 2 \\ 2 & 4 \\ 3 & 6 \end{array}]$
2846	求解最简化梯阵形式	[[1,2,3],[x,y,z]]	$[\begin{array}{c} 1 & 2 & 3 \\ x & y & z \end{array}]$
2847	求解最简化梯阵形式	[[-1,2,4],[-6,6,24]]	$[\begin{array}{c} - 1 & 2 & 4 \\ - 6 & 6 & 24 \end{array}]$
2848	求解最简化梯阵形式	[[1,1,1,1],[0.04,0.05,0.08,0.02],[0.04,-0.1,0,0]]	$[\begin{array}{c} 1 & 1 & 1 & 1 \\ 0.04 & 0.05 & 0.08 & 0.02 \\ 0.04 & - 0.1 & 0 & 0 \end{array}]$
2849	求解最简化梯阵形式	[[3,3,9,0],[5,6,6,0],[2,5,4,0]]	$[\begin{array}{c} 3 & 3 & 9 & 0 \\ 5 & 6 & 6 & 0 \\ 2 & 5 & 4 & 0 \end{array}]$
2850	求解最简化梯阵形式	[[-3,-3,9],[4,1,-18],[2,-1,-12]]	$[\begin{array}{c} - 3 & - 3 & 9 \\ 4 & 1 & - 18 \\ 2 & - 1 & - 12 \end{array}]$
2851	求解最简化梯阵形式	[[3,5,31,-4],[-1,1,3,-4],[6,0,12,12]]=0	$[\begin{array}{c} 3 & 5 & 31 & - 4 \\ - 1 & 1 & 3 & - 4 \\ 6 & 0 & 12 & 12 \end{array}] = 0$
2852	求解最简化梯阵形式	[[-3,6,21,30],[1,4,9,12]]	$[\begin{array}{c} - 3 & 6 & 21 & 30 \\ 1 & 4 & 9 & 12 \end{array}]$
2853	求解最简化梯阵形式	[[3,-6,21],[0,42,-21],[2,24,0],[2,54,-15]]	$[\begin{array}{c} 3 & - 6 & 21 \\ 0 & 42 & - 21 \\ 2 & 24 & 0 \\ 2 & 54 & - 15 \end{array}]$
2854	求解最简化梯阵形式	[[3,7,8,90],[2,-2,2,10],[4,7,8,92],[3,4,6,64]]	$[\begin{array}{c} 3 & 7 & 8 & 90 \\ 2 & - 2 & 2 & 10 \\ 4 & 7 & 8 & 92 \\ 3 & 4 & 6 & 64 \end{array}]$
2855	求解最简化梯阵形式	[[3a,-2b,c,12],[3a,-2b,c,-2],[3a,-2b,c,11]]	$[\begin{array}{c} 3 a & - 2 b & c & 12 \\ 3 a & - 2 b & c & - 2 \\ 3 a & - 2 b & c & 11 \end{array}]$
2856	求解最简化梯阵形式	[[3a,-4b,5],[-5a,6b,3]]	$[\begin{array}{c} 3 a & - 4 b & 5 \\ - 5 a & 6 b & 3 \end{array}]$
2857	求解最简化梯阵形式	[[3x-y=5],[4x+2y=0]]	$[\begin{array}{c} 3 x - y = 5 \\ 4 x + 2 y = 0 \end{array}]$
2858	求解最简化梯阵形式	([[-4,0],[8,1],[-4,-2]]*1)/2	$\frac{[\begin{array}{c} - 4 & 0 \\ 8 & 1 \\ - 4 & - 2 \end{array}] \cdot 1}{2}$
2859	求解最简化梯阵形式	[[4,20,31],[6,-5,-6],[2,-11,-16]]	$[\begin{array}{c} 4 & 20 & 31 \\ 6 & - 5 & - 6 \\ 2 & - 11 & - 16 \end{array}]$
2860	求解最简化梯阵形式	[[4,252],[4,-4]]	$[\begin{array}{c} 4 & 252 \\ 4 & - 4 \end{array}]$
2861	求解最简化梯阵形式	[[4,-3,1,-7],[0,7/4,15/4,23/4],[0,0,27/7,54/7]]	$[\begin{array}{c} 4 & - 3 & 1 & - 7 \\ 0 & \frac{7}{4} & \frac{15}{4} & \frac{23}{4} \\ 0 & 0 & \frac{27}{7} & \frac{54}{7} \end{array}]$
2862	求解最简化梯阵形式	[[4,3,-3,-7],[-8,-3,15,-1],[16,3,-39,17]]	$[\begin{array}{c} 4 & 3 & - 3 & - 7 \\ - 8 & - 3 & 15 & - 1 \\ 16 & 3 & - 39 & 17 \end{array}]$
2863	求解最简化梯阵形式	[[4,4,8,0],[-12,-12,-24,0],[0,-3,-9,0]]	$[\begin{array}{c} 4 & 4 & 8 & 0 \\ - 12 & - 12 & - 24 & 0 \\ 0 & - 3 & - 9 & 0 \end{array}]$
2864	求解最简化梯阵形式	[[4,5,8],[8,10,-3]]	$[\begin{array}{c} 4 & 5 & 8 \\ 8 & 10 & - 3 \end{array}]$
2865	求解最简化梯阵形式	[[5,1,4],[1,0,5],[0,1,1]]	$[\begin{array}{c} 5 & 1 & 4 \\ 1 & 0 & 5 \\ 0 & 1 & 1 \end{array}]$
2866	求解最简化梯阵形式	[[5x+2y=1],[-3x+3y=5]]	$[\begin{array}{c} 5 x + 2 y = 1 \\ - 3 x + 3 y = 5 \end{array}]$
2867	求解最简化梯阵形式	[[5x+8y=21],[-9x-7y=14]]	$[\begin{array}{c} 5 x + 8 y = 21 \\ - 9 x - 7 y = 14 \end{array}]$
2868	求解最简化梯阵形式	[[6,1,5],[9,24,2]]	$[\begin{array}{c} 6 & 1 & 5 \\ 9 & 24 & 2 \end{array}]$
2869	求解最简化梯阵形式	[[6,3,3,33],[3,3,0,15],[3,0,3,18]]	$[\begin{array}{c} 6 & 3 & 3 & 33 \\ 3 & 3 & 0 & 15 \\ 3 & 0 & 3 & 18 \end{array}]$
2870	求解最简化梯阵形式	[[6,-4,10],[-1,0,6],[10,7,-4]]	$[\begin{array}{c} 6 & - 4 & 10 \\ - 1 & 0 & 6 \\ 10 & 7 & - 4 \end{array}]$
2871	求解最简化梯阵形式	[[2,6,27],[3,5,53]]	$[\begin{array}{c} 2 & 6 & 27 \\ 3 & 5 & 53 \end{array}]$
2872	求解最简化梯阵形式	[[28,11,8,6]]	$[\begin{array}{c} 28 & 11 & 8 & 6 \end{array}]$
2873	求解最简化梯阵形式	[[2n],[n-1]]	$[\begin{array}{c} 2 n \\ n - 1 \end{array}]$
2874	求解最简化梯阵形式	[[2x+7y=48],[3x-12y=27]]	$[\begin{array}{c} 2 x + 7 y = 48 \\ 3 x - 12 y = 27 \end{array}]$
2875	求解最简化梯阵形式	[[2x+y=6],[2x+5y=22]]	$[\begin{array}{c} 2 x + y = 6 \\ 2 x + 5 y = 22 \end{array}]$
2876	求解最简化梯阵形式	[[3,-2,4,0],[9,-6,12,0],[6,-4,8,0]]	$[\begin{array}{c} 3 & - 2 & 4 & 0 \\ 9 & - 6 & 12 & 0 \\ 6 & - 4 & 8 & 0 \end{array}]$
2877	求解最简化梯阵形式	[[2,2]]	$[\begin{array}{c} 2 & 2 \end{array}]$
2878	求解最简化梯阵形式	[[-8,1,4,-3],[2,1,-1,-3]]	$[\begin{array}{c} - 8 & 1 & 4 & - 3 \\ 2 & 1 & - 1 & - 3 \end{array}]$
2879	求解最简化梯阵形式	[[8,48],[0,0],[0,0]]	$[\begin{array}{c} 8 & 48 \\ 0 & 0 \\ 0 & 0 \end{array}]$
2880	求定义域	x^2-4.5x+2.8=0	$x^{2} - 4.5 x + 2.8 = 0$
2881	求定义域	x^2-49=0	$x^{2} - 49 = 0$
2882	求定义域	x^2-4x-8	$x^{2} - 4 x - 8$
2883	求定义域	x^2-5x-4	$x^{2} - 5 x - 4$
2884	求定义域	x^2-6x^8+10x^3	$x^{2} - 6 x^{8} + 10 x^{3}$
2885	求定义域	x^2-6x=16	$x^{2} - 6 x = 16$
2886	求定义域	x^2-6x-27=0	$x^{2} - 6 x - 27 = 0$
2887	求定义域	x^2-6x-64=8	$x^{2} - 6 x - 64 = 8$
2888	求定义域	x^2-7x+12	$x^{2} - 7 x + 12$
2889	求定义域	x^2-7x=60	$x^{2} - 7 x = 60$
2890	求定义域	x^2-7x-8	$x^{2} - 7 x - 8$
2891	求定义域	x^2-9=0	$x^{2} - 9 = 0$
2892	求定义域	x^2y+xy=1	$x^{2} y + x y = 1$
2893	求定义域	x^3-9	$x^{3} - 9$
2894	求定义域	x^2+3y	$x^{2} + 3 y$
2895	求定义域	-x^2+4x-20	$- x^{2} + 4 x - 20$
2896	求定义域	x^2+5x=0	$x^{2} + 5 x = 0$
2897	求定义域	x^2+9x-6	$x^{2} + 9 x - 6$
2898	求定义域	x^2+x-20=0	$x^{2} + x - 20 = 0$
2899	求定义域	x^2=1/5y	$x^{2} = \frac{1}{5} y$
2900	求定义域	x^2=144	$x^{2} = 144$