1.

Let f(x)= x/(x+3), then 1/f(x+1)-f(1/(x+1))= ?

Answer»

`(3x^2+7x+4)/(3(X^2+5x+5)`
`(3(x^2+5x+5))/(3x^2+7x+4)`
`(-x(2x+3))/((x+3)^2)`
`(-(x-3)^2)/(x((2x+3))`

ANSWER :B


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