$\"\"$

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The integral is $\"\"$ .

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Consider $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in the integral.

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$\"\"$

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Integral formula : $\"\"$ .

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Hence to evaluate the integral, integration formula of logarithm is used.

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$\"\"$

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(b)

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The integral is $\"\"$ .

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Consider $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in the integral.

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$\"\"$

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Hence to evaluate the integral, integration substitution method is used.

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$\"\"$

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(a) Integration formula of logarithm is used.

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(b) Integration substitution method is used.