Q. The value of $\lim_{x \rightarrow \infty}\frac{\sqrt{1 + x^{4}} - (1 + x^{2})}{x^{2}}$ is equal to

A) 0
B) -1
C) 2
D) None of these
Explanation

(a)
$\lim_{x \rightarrow \infty}\frac{\sqrt{1 + x^{4}} - (1 + x^{2})}{x^{2}} = \lim_{x \rightarrow \infty}\frac{\sqrt{1 + \frac{1}{x^{4}}} - \left( 1 + \frac{1}{x^{2}} \right)}{1}$
$= \frac{1 - 1}{1} = 0$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

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