For each $x \in \mathbb{R}$, Let $[x]$ represent greatest integer function, then $\lim _{x \rightarrow…

For each $x \in \mathbb{R}$, Let $[x]$ represent greatest integer function, then $\lim _{x \rightarrow 0^{-}} \frac{x([x]+|x|) \sin [x]}{|x|}$ is equal to
  1. 0
  2. 1
  3. $\sin 1$
  4. $-\sin 1$

Solution

$\begin{aligned} & \lim _{x \rightarrow 0^{-}} \frac{x([x]+|x|) \sin [x]}{x} \\ & \text { For } x \rightarrow 0^{-},[x]=-1,|x|=-x \\ \therefore \quad & \lim _{x \rightarrow 0^{-}} \frac{x(-1-x) \sin (-1)}{-x} \\ & =\lim _{x \rightarrow 0^{-}} \frac{-(1+x) \sin (1)}{1} \quad \ldots[x \rightarrow 0, x \neq 0] \\ \therefore & =-(1+0) \sin 1 \\ & =-\sin 1\end{aligned}$

Asked in: MHT CET 2024 (03 May Shift 2)

Practice more Limits questions on Aicharya