Finite Math Examples

Find Where Undefined/Discontinuous ( log of square root of x square root of x)/( log of cube root of x)
log(xx)log(3x)
Step 1
Set the denominator in log(xx)log(3x) equal to 0 to find where the expression is undefined.
log(3x)=0
Step 2
Solve for x.
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Step 2.1
Rewrite log(3x)=0 in exponential form using the definition of a logarithm. If x and b are positive real numbers and b1, then logb(x)=y is equivalent to by=x.
100=3x
Step 2.2
Solve for x.
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Step 2.2.1
Rewrite the equation as 3x=100.
3x=100
Step 2.2.2
To remove the radical on the left side of the equation, cube both sides of the equation.
3x3=(100)3
Step 2.2.3
Simplify each side of the equation.
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Step 2.2.3.1
Use nax=axn to rewrite 3x as x13.
(x13)3=(100)3
Step 2.2.3.2
Simplify the left side.
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Step 2.2.3.2.1
Simplify (x13)3.
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Step 2.2.3.2.1.1
Multiply the exponents in (x13)3.
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Step 2.2.3.2.1.1.1
Apply the power rule and multiply exponents, (am)n=amn.
x133=(100)3
Step 2.2.3.2.1.1.2
Cancel the common factor of 3.
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Step 2.2.3.2.1.1.2.1
Cancel the common factor.
x133=(100)3
Step 2.2.3.2.1.1.2.2
Rewrite the expression.
x1=(100)3
x1=(100)3
x1=(100)3
Step 2.2.3.2.1.2
Simplify.
x=(100)3
x=(100)3
x=(100)3
Step 2.2.3.3
Simplify the right side.
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Step 2.2.3.3.1
Simplify (100)3.
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Step 2.2.3.3.1.1
Multiply the exponents in (100)3.
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Step 2.2.3.3.1.1.1
Apply the power rule and multiply exponents, (am)n=amn.
x=1003
Step 2.2.3.3.1.1.2
Multiply 0 by 3.
x=100
x=100
Step 2.2.3.3.1.2
Anything raised to 0 is 1.
x=1
x=1
x=1
x=1
x=1
x=1
Step 3
Set the argument in log(xx) less than or equal to 0 to find where the expression is undefined.
xx0
Step 4
Solve for x.
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Step 4.1
To remove the radical on the left side of the inequality, square both sides of the inequality.
xx202
Step 4.2
Simplify each side of the inequality.
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Step 4.2.1
Use nax=axn to rewrite xx as (xx)12.
((xx)12)202
Step 4.2.2
Simplify the left side.
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Step 4.2.2.1
Simplify ((xx)12)2.
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Step 4.2.2.1.1
Multiply the exponents in ((xx)12)2.
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Step 4.2.2.1.1.1
Apply the power rule and multiply exponents, (am)n=amn.
(xx)12202
Step 4.2.2.1.1.2
Cancel the common factor of 2.
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Step 4.2.2.1.1.2.1
Cancel the common factor.
(xx)12202
Step 4.2.2.1.1.2.2
Rewrite the expression.
(xx)102
(xx)102
(xx)102
Step 4.2.2.1.2
Simplify.
xx02
xx02
xx02
Step 4.2.3
Simplify the right side.
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Step 4.2.3.1
Raising 0 to any positive power yields 0.
xx0
xx0
xx0
Step 4.3
To remove the radical on the left side of the inequality, square both sides of the inequality.
(xx)202
Step 4.4
Simplify each side of the inequality.
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Step 4.4.1
Use nax=axn to rewrite x as x12.
(xx12)202
Step 4.4.2
Simplify the left side.
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Step 4.4.2.1
Simplify (xx12)2.
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Step 4.4.2.1.1
Multiply x by x12 by adding the exponents.
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Step 4.4.2.1.1.1
Multiply x by x12.
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Step 4.4.2.1.1.1.1
Raise x to the power of 1.
(x1x12)202
Step 4.4.2.1.1.1.2
Use the power rule aman=am+n to combine exponents.
(x1+12)202
(x1+12)202
Step 4.4.2.1.1.2
Write 1 as a fraction with a common denominator.
(x22+12)202
Step 4.4.2.1.1.3
Combine the numerators over the common denominator.
(x2+12)202
Step 4.4.2.1.1.4
Add 2 and 1.
(x32)202
(x32)202
Step 4.4.2.1.2
Multiply the exponents in (x32)2.
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Step 4.4.2.1.2.1
Apply the power rule and multiply exponents, (am)n=amn.
x32202
Step 4.4.2.1.2.2
Cancel the common factor of 2.
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Step 4.4.2.1.2.2.1
Cancel the common factor.
x32202
Step 4.4.2.1.2.2.2
Rewrite the expression.
x302
x302
x302
x302
x302
Step 4.4.3
Simplify the right side.
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Step 4.4.3.1
Raising 0 to any positive power yields 0.
x30
x30
x30
Step 4.5
Solve for x.
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Step 4.5.1
Take the specified root of both sides of the inequality to eliminate the exponent on the left side.
3x330
Step 4.5.2
Simplify the equation.
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Step 4.5.2.1
Simplify the left side.
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Step 4.5.2.1.1
Pull terms out from under the radical.
x30
x30
Step 4.5.2.2
Simplify the right side.
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Step 4.5.2.2.1
Simplify 30.
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Step 4.5.2.2.1.1
Rewrite 0 as 03.
x303
Step 4.5.2.2.1.2
Pull terms out from under the radical.
x0
x0
x0
x0
x0
x0
Step 5
Set the argument in log(3x) less than or equal to 0 to find where the expression is undefined.
3x0
Step 6
Solve for x.
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Step 6.1
To remove the radical on the left side of the inequality, cube both sides of the inequality.
3x303
Step 6.2
Simplify each side of the inequality.
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Step 6.2.1
Use nax=axn to rewrite 3x as x13.
(x13)303
Step 6.2.2
Simplify the left side.
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Step 6.2.2.1
Simplify (x13)3.
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Step 6.2.2.1.1
Multiply the exponents in (x13)3.
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Step 6.2.2.1.1.1
Apply the power rule and multiply exponents, (am)n=amn.
x13303
Step 6.2.2.1.1.2
Cancel the common factor of 3.
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Step 6.2.2.1.1.2.1
Cancel the common factor.
x13303
Step 6.2.2.1.1.2.2
Rewrite the expression.
x103
x103
x103
Step 6.2.2.1.2
Simplify.
x03
x03
x03
Step 6.2.3
Simplify the right side.
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Step 6.2.3.1
Raising 0 to any positive power yields 0.
x0
x0
x0
x0
Step 7
Set the radicand in x less than 0 to find where the expression is undefined.
x<0
Step 8
Set the radicand in xx less than 0 to find where the expression is undefined.
xx<0
Step 9
Solve for x.
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Step 9.1
To remove the radical on the left side of the inequality, square both sides of the inequality.
(xx)2<02
Step 9.2
Simplify each side of the inequality.
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Step 9.2.1
Use nax=axn to rewrite x as x12.
(xx12)2<02
Step 9.2.2
Simplify the left side.
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Step 9.2.2.1
Simplify (xx12)2.
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Step 9.2.2.1.1
Multiply x by x12 by adding the exponents.
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Step 9.2.2.1.1.1
Multiply x by x12.
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Step 9.2.2.1.1.1.1
Raise x to the power of 1.
(x1x12)2<02
Step 9.2.2.1.1.1.2
Use the power rule aman=am+n to combine exponents.
(x1+12)2<02
(x1+12)2<02
Step 9.2.2.1.1.2
Write 1 as a fraction with a common denominator.
(x22+12)2<02
Step 9.2.2.1.1.3
Combine the numerators over the common denominator.
(x2+12)2<02
Step 9.2.2.1.1.4
Add 2 and 1.
(x32)2<02
(x32)2<02
Step 9.2.2.1.2
Multiply the exponents in (x32)2.
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Step 9.2.2.1.2.1
Apply the power rule and multiply exponents, (am)n=amn.
x322<02
Step 9.2.2.1.2.2
Cancel the common factor of 2.
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Step 9.2.2.1.2.2.1
Cancel the common factor.
x322<02
Step 9.2.2.1.2.2.2
Rewrite the expression.
x3<02
x3<02
x3<02
x3<02
x3<02
Step 9.2.3
Simplify the right side.
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Step 9.2.3.1
Raising 0 to any positive power yields 0.
x3<0
x3<0
x3<0
Step 9.3
Solve for x.
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Step 9.3.1
Take the specified root of both sides of the inequality to eliminate the exponent on the left side.
3x3<30
Step 9.3.2
Simplify the equation.
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Step 9.3.2.1
Simplify the left side.
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Step 9.3.2.1.1
Pull terms out from under the radical.
x<30
x<30
Step 9.3.2.2
Simplify the right side.
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Step 9.3.2.2.1
Simplify 30.
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Step 9.3.2.2.1.1
Rewrite 0 as 03.
x<303
Step 9.3.2.2.1.2
Pull terms out from under the radical.
x<0
x<0
x<0
x<0
x<0
Step 9.4
Find the domain of xx.
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Step 9.4.1
Set the radicand in x greater than or equal to 0 to find where the expression is defined.
x0
Step 9.4.2
The domain is all values of x that make the expression defined.
[0,)
[0,)
Step 9.5
Use each root to create test intervals.
x<0
x>0
Step 9.6
Choose a test value from each interval and plug this value into the original inequality to determine which intervals satisfy the inequality.
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Step 9.6.1
Test a value on the interval x<0 to see if it makes the inequality true.
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Step 9.6.1.1
Choose a value on the interval x<0 and see if this value makes the original inequality true.
x=-2
Step 9.6.1.2
Replace x with -2 in the original inequality.
(-2)-2<0
Step 9.6.1.3
The left side is not equal to the right side, which means that the given statement is false.
False
False
Step 9.6.2
Test a value on the interval x>0 to see if it makes the inequality true.
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Step 9.6.2.1
Choose a value on the interval x>0 and see if this value makes the original inequality true.
x=2
Step 9.6.2.2
Replace x with 2 in the original inequality.
(2)2<0
Step 9.6.2.3
The left side 2.82842712 is not less than the right side 0, which means that the given statement is false.
False
False
Step 9.6.3
Compare the intervals to determine which ones satisfy the original inequality.
x<0 False
x>0 False
x<0 False
x>0 False
Step 9.7
Since there are no numbers that fall within the interval, this inequality has no solution.
No solution
No solution
Step 10
The equation is undefined where the denominator equals 0, the argument of a square root is less than 0, or the argument of a logarithm is less than or equal to 0.
x0,x=1
(-,0][1,1]
Step 11
 [x2  12  π  xdx ]