Question

Let f(x) be defined in the interval [0,4] such that f(x) = 1-x, 0=<x=<1;x+2, 1<x<2;4-x, 2=<x=<4 then the number of points where f(f(x)) is discontinuous is
1) 1
2) 2
3) 3
4) 4​

Answer 1

Answer:

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