(adsbygoogle = window.adsbygoogle || []).push({}); Polynomial Function.

1. The problem statement, all variables and given/known data

f:ℝ→ℝ

x→x^2+x+2

2. Relevant equations

Prove that: f(ℝ)=[7/4,+∞[

3. The attempt at a solution

Well I don't know how answer this, so can someone give me a clue on how to start it off?

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# Application in Set Theory

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