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Convex/cocave function?

  1. May 5, 2009 #1

    Edwinkumar

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    Is it true that [tex]f(x)=x^a[/tex] is always a strictly convex function for [tex]a>1[/tex] on [tex](0,\infty)[/tex]?
     
    Edwinkumar, May 5, 2009
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  3. May 5, 2009 #2

    snipez90

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    Find the sign of f''(x).
     
    snipez90, May 5, 2009
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