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Sunday, November 2, 2008

Q) Find the integral of :


A)


=

=


Now take out the 1 and you get:

e^x + e^x [ f(x) + f'(x) ] ..... where f(x) = -4/(x+4)

And we know that integral of e^x [ f(x) + f'(x) ] = e^x. f(x) + C

So the integral is :

e^x + e^x.[-4 / (x+4) ] + C

OR

e^x . [x/ (x+4)] + C

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