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Let f (x) =|2x-9|+|2x+9|. Which of the f...

Let `f (x) =|2x-9|+|2x+9|.` Which of the following are true ?

A

`f(x)` is not differentiable at `x=9/2`

B

f(x) is not differentiable at `x=(-9)/2`

C

f(x) is not differentiable at `x=0` differentiable at `x=(-9)/2, 0, 9/2`

D

f(x) is not differentiable at `x=(-9)/2, 0,9/2`

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A, B, C
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VMC MODULES ENGLISH-DIFFERENTIAL CALCULUS-LEVEL 2
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