Question: How to slove the question? (b) (i) Use the method of integration by parts to evaluate the integral I xzecix. (3 marks) (ii) Contamination is

How to slove the question?

(b) (i) Use the method of integration by parts to evaluate the integral I xze"cix. (3 marks) (ii) Contamination is leaking from an underground wastedisposal tank. The amount of leakage L (measured in gallons) two days since the leak began is modelled by L=I:[ln(t+1)]zdz. t-I-l Use the substitution t=e' 1 and the result of(b)(i) to evaluate L. (4 marks)

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