determining intervals: f(x) = cubed root of (x + 2)

[Guest]

ok, so... f(x) = cubed root of (x + 2)

the answer is (negative infinity, positive infinity)

if you plug a negative number greater than 2 for x your going to get a negative number inside the cubed root. cubed, the answer will end up negative. i thought you were not suposed to have a negative number inside roots?

 

[stapel]

ok, so... f(x) = cubed root of (x + 2)

the answer is (negative infinity, positive infinity)

This might be the answer, but what is the question? I see no instructions in your post.

Also, I know what a "cube root" is (the third root, or the one-third power), and I know what "cubed" is (raised to the power 3), but what do you mean by the "cubed root"? Perhaps the cube of the square root...?

Eliz.

 

[Guest]

question: determine the intervals on which f (x) is continuous..

it's just cube root.

 

[stapel]

question: determine the intervals on which f (x) is continuous. it's just cube root.

Have you looked at the graph yet?

Eliz.