Q. If $f(x) = \left\{ \begin{array}{r} \frac{\sin{(1 + \lbrack x\rbrack)}}{\lbrack x\rbrack},\ \ \ \ for\ \lbrack x\rbrack \neq 0 \\ 0,\ \ \ \ \ for\ \lbrack x\rbrack = 0 \end{array} \right.\$ Where $\lbrack x\rbrack$ denotes the greatest integer not exceeding $x$, then $\lim_{x \rightarrow 0^{-}}{f(x)}$ is equal to

A) -1
B) 0
C) 1
D) 2
Explanation

(b)
$\lim_{x \rightarrow 0^{-}}{f(x)} = \lim_{x \rightarrow 0^{-}}\frac{\sin{(1 + \lbrack x\rbrack)}}{\lbrack x\rbrack}$
$= \frac{\sin{(1 - 1)}}{- 1} = 0$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.