non sat calc question?

iin77
Wed, 21 Nov 2007 20:47:53 +0000

First, this should be posted in the AP forum.

Second, you’re correct.

Third, here’s how I did it:
y=2x-8
xy=N
x(2x-8)=N
N is minimum when its derivative = 0.
4x-8=0
x=2
y=-4
xy=-8