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- Feb 5, 2012

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**Flipflop's question from Math Help Forum,**

Hi Flipflop,Determine the following:

a)\[\int\frac{1}{e^x+2}\,dx\]

b)\[\int\frac{\sqrt{16x^2-9}}{x}\,dx\]

How do I do part (b). I've been stuck at it for hours, even after looking at all the different types of integration formulas.

For the first one substitute, \(u=e^x+2\). For the second one substitute, \(x=\dfrac{9}{16}\sec u\). Hope you can continue.

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