1.

`f(x)=(1)/(1-x)` points of discontinuity of the composite function `f(f(x))` are:A. `x=0,1,2`B. `x=-1,1`C. `x=1,2`D. `x=0,1`

Answer» Correct Answer - D
`x=1` is a point discontinuity
`f(f(x))=(x-1)/(x)`
`x=0` is a point of discontinuity


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