Calculus Examples

Evaluate Using L'Hospital's Rule limit as x approaches 1 of ( natural log of x^2)/(x^2-1)
Step 1
Evaluate the limit of the numerator and the limit of the denominator.
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Step 1.1
Take the limit of the numerator and the limit of the denominator.
Step 1.2
Evaluate the limit of the numerator.
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Step 1.2.1
Evaluate the limit.
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Step 1.2.1.1
Move the limit inside the logarithm.
Step 1.2.1.2
Move the exponent from outside the limit using the Limits Power Rule.
Step 1.2.2
Evaluate the limit of by plugging in for .
Step 1.2.3
Simplify the answer.
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Step 1.2.3.1
One to any power is one.
Step 1.2.3.2
The natural logarithm of is .
Step 1.3
Evaluate the limit of the denominator.
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Step 1.3.1
Evaluate the limit.
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Step 1.3.1.1
Split the limit using the Sum of Limits Rule on the limit as approaches .
Step 1.3.1.2
Move the exponent from outside the limit using the Limits Power Rule.
Step 1.3.1.3
Evaluate the limit of which is constant as approaches .
Step 1.3.2
Evaluate the limit of by plugging in for .
Step 1.3.3
Simplify the answer.
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Step 1.3.3.1
Simplify each term.
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Step 1.3.3.1.1
One to any power is one.
Step 1.3.3.1.2
Multiply by .
Step 1.3.3.2
Subtract from .
Step 1.3.3.3
The expression contains a division by . The expression is undefined.
Undefined
Step 1.3.4
The expression contains a division by . The expression is undefined.
Undefined
Step 1.4
The expression contains a division by . The expression is undefined.
Undefined
Step 2
Since is of indeterminate form, apply L'Hospital's Rule. L'Hospital's Rule states that the limit of a quotient of functions is equal to the limit of the quotient of their derivatives.
Step 3
Find the derivative of the numerator and denominator.
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Step 3.1
Differentiate the numerator and denominator.
Step 3.2
Differentiate using the chain rule, which states that is where and .
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Step 3.2.1
To apply the Chain Rule, set as .
Step 3.2.2
The derivative of with respect to is .
Step 3.2.3
Replace all occurrences of with .
Step 3.3
Differentiate using the Power Rule which states that is where .
Step 3.4
Combine and .
Step 3.5
Combine and .
Step 3.6
Cancel the common factor of and .
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Step 3.6.1
Factor out of .
Step 3.6.2
Cancel the common factors.
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Step 3.6.2.1
Factor out of .
Step 3.6.2.2
Cancel the common factor.
Step 3.6.2.3
Rewrite the expression.
Step 3.7
By the Sum Rule, the derivative of with respect to is .
Step 3.8
Differentiate using the Power Rule which states that is where .
Step 3.9
Since is constant with respect to , the derivative of with respect to is .
Step 3.10
Add and .
Step 4
Multiply the numerator by the reciprocal of the denominator.
Step 5
Combine factors.
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Step 5.1
Multiply by .
Step 5.2
Raise to the power of .
Step 5.3
Raise to the power of .
Step 5.4
Use the power rule to combine exponents.
Step 5.5
Add and .
Step 6
Evaluate the limit.
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Step 6.1
Cancel the common factor of .
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Step 6.1.1
Cancel the common factor.
Step 6.1.2
Rewrite the expression.
Step 6.2
Split the limit using the Limits Quotient Rule on the limit as approaches .
Step 6.3
Evaluate the limit of which is constant as approaches .
Step 6.4
Move the exponent from outside the limit using the Limits Power Rule.
Step 7
Evaluate the limit of by plugging in for .
Step 8
Simplify the answer.
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Step 8.1
One to any power is one.
Step 8.2
Divide by .