Proof In Exercises 71-76, use integration by parts to prove the formula. (For Exercises 71-74, assume that n is a positive integer.)
To prove: The formula given as, .
The formula is:
Integration by parts formula,
Consider the integral, .
Now, differentiate both the sides with respect to .
And let, .
Now, integrate both the sides.
Now, apply integration by parts:
Substitute the values
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