Thursday

August 28, 2014

August 28, 2014

Posted by **pipi** on Thursday, November 6, 2008 at 8:27pm.

h(x)=2/x

- high school calculas -
**Reiny**, Thursday, November 6, 2008 at 8:59pmh'(x) = -2/x^2

a function is increasing when its first derivative is positive, and

a function is decreasing when its first derivative is negative.

now look at our derivative, notice the bottom is a square of x, so no matter what you put in, the result will be positive, and this is divided into -2.

so what result will we get??

also notice that both the original and the derivative are undefined for x=0

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