Ifint(3e^x-5e^(-x))/(4e^x+5e^(-x))dx=a x...

`Ifint(3e^x-5e^(-x))/(4e^x+5e^(-x))dx=a x+bln(4e^x+5e^(-x))+C ,t h e n` (a) `a=-1/8,b=7/8` (b) `a=1/8,b=7/8` (c) `a=-1/8,b=-7/8` (d) `a=1/8,b=-7/8""`

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