- #1

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## Homework Statement

Show that f(x) = x^4 + 4x + c = 0 has at most 2 roots.

## Homework Equations

## The Attempt at a Solution

I'm not really sure how to approach this problem, I think I have to use the IMVT / Rolle's Theorem / MVT.

Any help to even get me started would be greatly appreciated!