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evagelos
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Homework Statement
Prove that: [tex]y^5+y^2-7y+5\geq 0[/tex] ,for all [tex]y\geq 1[/tex]
Homework Equations
The Attempt at a Solution
[tex]y^5\geq 1[/tex] and [tex]y^2\geq 1[/tex] => [tex]y^5+y^2\geq 2[/tex].
Also [tex]-7y+5\leq -2[/tex] , and then?