How to evaluate x?

Question

Evaluate the limit. If the limit does not exist, enter DNE.
$lim_(x→−4)quad x+4x^3+64$

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Answer 1 · 2018-03-17T05:10:03

$\lim _{x\to -4}(x+4x^3+64)=-196$

$\lim _{x\to -4}(x+4x^3+64)$

Plug in the value $x=-4$

$=-4+4(-4)^3+64$

Simplify:

$=-196$

That's it!