Q:

Evaluate the following integral ∫e^x/(e^x+1) dx

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Evaluate  the following integral ∫e^x/(e^x+1)  dx

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Put z  =e^x then   dz=e^x dx
1=∫dz/(z+1)=ln⁡|z+1|+c=ln⁡|x^x+1|+c

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