Practicing Success
The left hand limit at x = a for the function $f(x)=\left\{\begin{matrix}\frac{|x|^3}{a}-\left[\frac{x}{a}\right]^3\end{matrix}\right\}(a > 0)$, where [x] denotes the greatest integer less than or equal to x is |
$a^2$ $a^2-1$ $a^2-3$ none of these |
$a^2$ |
For left hand limit x < a i.e., x = a − h, where h → 0 and a > 0 ∴ x is positive |x|= x Also, $\frac{x}{a}<1$ but it is positive $\frac{x}{a}$ lies between 0 and 1 so that $\left[\frac{x}{a}\right]=0$ $∴\lim f(x)=\frac{a^3}{a}-0=a^2$ |