1.

int(e^x+e^(-x))/(e^x-e^(-x))dx

Answer»

SOLUTION :`INT(e^x+e^(-x))/(e^x-e^(-x))DX`
[put `(e^x+e^(-x)=t` then `(e^x+e^(-x)dx=dt)`
`int(dt/t)=Inabst+C` =`(Inabs(e^x-e^(-x))+C`


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