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Polynomial Function.
f:ℝ→ℝ
x→x^2+x+2
Prove that: f(ℝ)=[7/4,+∞[
Well I don't know how answer this, so can someone give me a clue on how to start it off?
Homework Statement
f:ℝ→ℝ
x→x^2+x+2
Homework Equations
Prove that: f(ℝ)=[7/4,+∞[
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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