Find two positive numbers that satisfy the given requirements.(adsbygoogle = window.adsbygoogle || []).push({});

The Product is 192 and the sum is a minimum.

I said that x*y=192 and y=192/x and that dy/dx= -192/x^2

I thought that we were supposed to set the derivitive equal to zero in order to find the local extrema... however -192/x^2 does not equal 0...right???

I'm dazed and confused... can someone please help?

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# Homework Help: Simple application of Derivitives problem

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