Question: I need to prove the following statement by proof by contrapositive or proof by contradiction: Suppose x R. If x 5 4x 4 + 3x

I need to prove the following statement by proof by contrapositive or proof by contradiction:

Suppose x R. If x 5 4x 4 + 3x 3 x 2 + 3x 4 0 then x 0.

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