1.

Integration by partial fraction : int(4e^(x)+6e^(-x))/(9e^(x)-4e^(-x))dx=Ax+B log(9e^(x)-4e^(-x))+c then A+B=.

Answer»

`(4)/(9)`
`(4)/(36)`
`(35)/(36)`
`(9)/(4)`

ANSWER :A


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