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Q6 of 865 Page 20

Evaluate the following integrals:

Assume 1 + e^x = t

⇒ d(1 + e^x) = dt

⇒ e^xdx = dt

∴ Substituting t and dt in given equation we get

⇒

⇒

⇒

But 1 + e^x = t

⇒ .

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