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January 30, 2015

January 30, 2015

Posted by **Haley** on Friday, September 23, 2011 at 7:24am.

find: f'(x), given f(x)=|x|

- calculus -
**Reiny**, Friday, September 23, 2011 at 11:13amthe graph of f(x) = |x|

is a V with the vertex at the origin.

(made up of y = x in quadrant I and y = -x in quadrant II)

your two graphs are y = x and y = -x

I will do the second part as x ---> 0 for y = -x

= lim (-(x+h) - (-x))/h as x ---> 0

= lim (-x - h + x)/h as x--> 0

= lim -h/h

= -1

do the same with f(x) = y = x to show

a result of +1

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