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**Unformatted text preview: **2) The demand for ground chuck (hamburger) in a certain regio
demand for ground chuck elastic or inelastic?
7 1 = elastic
a = 2.98 p
- 0.20
<1 = inelastic
E = P . do
E =
K P
2. 98 . p - 0. 20 . * ( 2 . 98 ) ( 0.20). p- 1:20
dp
P
P (2 9 8 ) ( 0 . 20 ) . P "
- P
298. 1 - 0.20
2.98 p- 0.20
- 1.20
da : ( 2.98 ) ( - 0. 20 ) . p- 0.20 - 1
P . p
(0. 20)
ap
P - 0. 20
= - (2.98) (0. 20 ) p - 1. 20
p 1- 1. 2
(0.20 )
0.20
P- 0.20
This demand
is inelastic
(0. 20)
P - 2 2
= 0. 20
3) Find the largest open intervals where the function is concave upward.
f (x) =x3- 3x2-4x +5
f (x ) = X - 3x - 4x +5
f ' (x ) = 3x2-6x-4
f" (x ) = 6x - 6
f " ( - 2 ) = - 18 A
f " ( 2 ) = 6 27
X - 6 = 0
6 X =
6
2
X = 1
oncave upward :
(1,00)...

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- Fall '19