Question

What is Limit of (x cubed + 3 x squared minus 5) as x approaches negative 2?

–25
–15
–9
–1

Answer 1

Explanation:

D. -1

Answer 2

–1

Explanation:

We want to find the following limit:

`\lim_(x \rightarrow -2) x^3 + 3x^2 - 5`

Since the function does not have any discontinuity(point in which the denominator is 0, for example), we just replace the values of x by -2. So

`\lim_(x \rightarrow -2) x^3 + 3x^2 - 5 = (-2)^3 + 3(-2)^2 - 5 = -8 + 12 - 5 = -13 + 12 = -1`

The value of the limit is -1.