Prove that, for all x > 1, .
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(x + y) (y + 2) 1. Prove that for any ,y,z ER: if I >y>2, then ry+yz >
Consider the function f defined by f (x ) = −2x + 3. Prove that for all M ∈ R, there existsx ∈ R such that f (x ) > M .