- #1
Carl_M
- 13
- 0
Homework Statement
Is there another way to do this question?
Is this right?
L = 50-2x
W = 40-2x
Height= X
Homework Equations
//
V=L x W x H
V= (50-2x)(40-2x)(x)
V= (2000 -180x +4x²)(x)
V= 2000x -180x² +4x³
V= 4x³ - 180x² +2000x
V' = 12x² -360x +2000
X = (360 (+/-)sqrt(360²-4(12)(2000))) / 2(12)
X = 7.36...
How would I do this without using f ' ( x ) ? nor graph it