Let f(x)=x-[x], x in RR, then f^(prime)(...

Let `f(x)=x-[x], x in RR`, then `f^(prime)(1/2)` is a. `3/2` b. 1 c. 0 d. -1

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Let `f(x)=x-[x], x in RR`, then `f^(prime)(1/2)` is 1

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