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September 22, 2014

September 22, 2014

Posted by **lori** on Friday, March 29, 2013 at 5:30pm.

f(x)= x/4 + 4/x

- calculus -
**Reiny**, Friday, March 29, 2013 at 6:27pmf ' (x) = 1/4 - 4/x^2

= 0 for a turning point (max/min)

1/4 = 4/x^2

x^2 = 16

x = ± 4

make a rough sketch to see that

the curve is increasing for x<-4 OR x>4

the curve is decreasing for -4 < x< 4 , x±0

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