JEE Math Practice Question
Let ƒ(x) = 15 – |x – 10|; x $$ \in $$ R. Then the set of all values of x, at which the function, g(x) = ƒ(ƒ(x)) is not differentiable, is :
- A.{10,15}
- B.{5,10,15,20}
- C.{10}
- D.{5,10,15}
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