If `int (4e^x+6e^-x)/(9e^x-4e^-x)dx=Ax+B ln (9e^(2x)-4)+C`, then

If `int (4e^x+6e^-x)/(9e^x-4e^-x)dx=Ax+B ln (9e^(2x)-4)+C`, then
A. `A=-(3)/(2),B=(35)/(36),C=0`
B. `A=(35)/(36),B=-(3)/(2),CinR`
C. `A=-(3)/(2),B=(35)/(36),CinR`
D. none of these

If `int (4e^x+6e^-x)/(9e^x-4e^-x)dx=Ax+B ln (9e^(2x)-4)+C`, then

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