Question

If f (x) = $( - \infty,\infty)$then -

• A. $( - \infty,\infty)$f (x) = e^-6
• B. $\lbrack - 2,\infty)$ f (x) = 2
• C. $( - 2,3)$ f (x) = e^-3
• D. $( - \infty, - 2)$ f (x) = e^-4

Answer 1

$\lim _ { x \rightarrow \infty }$ $\left( \frac { x } { 2 + x } \right) ^ { 2 x }$ ; 1^∞ form ⇒ $\mathrm { l } _ { \mathrm { x } \rightarrow \infty } \left( \frac { - 2 } { 2 + \mathrm { x } } \right) ^ { 2 \mathrm { x } }$ = e^–4