Find
$$\lim _ { x \rightarrow 8 } \frac { 5 x } { \sqrt { x + 2 } }$$
by direct substitution.
A) $\frac { 8 } { \sqrt { 10 } }$
B) $10 \sqrt { 2 }$
C) $40 \sqrt { 10 }$
D) 1
E) $\frac { 40 } { \sqrt { 10 } }$

Question

Quizplus · Accepted Answer

By directly substituting $x=8$ into the expression, we get $\frac{40}{\sqrt{10}}$. Therefore, the answer is $\boxed{	extbf{(E)}}$.

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Find $\lim _ { x \rightarrow 8 } \frac { 5 x } { \sqrt { x + 2 } }$