We are given, for a,b>0 and if a=b prove that f(a,b) is strictly increasing in both a and b I take the derivative, but I can't prove that it is positive. Help is much appreciated
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Originally Posted by altave86 We are given, for a,b>0 and if a=b prove that f(a,b) is strictly increasing in both a and b I take the derivative, but I can't prove that it is positive. Help is much appreciated , see this using the MVT on .
Originally Posted by altave86 We are given, for a,b>0 and if a=b prove that f(a,b) is strictly increasing in both a and b I take the derivative, but I can't prove that it is positive. Help is much appreciated Since (check the minimal point of ) , we're done.
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