Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Convex/cocave function?

  1. May 5, 2009 #1
    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]?
     
  2. jcsd
  3. May 5, 2009 #2
    Find the sign of f''(x).
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook