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AP® Calculus AB-BC

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Connect Derivatives to the Greatest Integer Function

APCALC-IQLGFS

If $[x]$ represents the greatest integer that is less than or equal to $x$, then $\cfrac{d}{dx} [x]$ at $x=1$ is:

A

$-1$

B

$0$

C

$1$

D

Nonexistent.