Question

The value of $\lbrack - \sqrt{2}, - 1\rbrack \cup \lbrack 1,\sqrt{2}\rbrack( - \infty, - 1\rbrack \cup \lbrack 1,\infty)$ is :

• A. 3
• B. 2
• C. 1
• D. 0

Answer 1

Answer: (C)

1

Answer 2

$\lim _ { x \rightarrow 0 }$ ⇒ $\lim _ { x \rightarrow 0 }$

Q $\lim _ { x \rightarrow 0 }$ $\frac { \sin x } { x }$ = 1

Apply L-Hospital rule

$\lim _ { x \rightarrow 0 }$

sec²0 = 1