NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Let P(n) be the proposition "If a and bare positive real numbers, then (a + b)nz an + bn." What type of proof was used to prove that P(1) is true? (You must provide an answer before moving to the next part.) Multiple Choice proof by cases proof by contradiction direct proof proof by contraposition

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