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proof the following statement using either direct proof, contrapositive, contradiction, or by cases. do not use induction. Va e Z. If x5 4x4 + 3x3

proof the following statement using either direct proof, contrapositive, contradiction, or by cases. do not use induction.

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Va e Z. If x5 4x4 + 3x3 x2 + 3x 4 > 0, then x > 0

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