x And y Are Real Numbers s.t 2 < x < 3 And -8

Sujoy

07/02/2018 2 0 0

Question:

x and y are real numbers s.t 2 < x < 3 and -8<y:

A) x^2 y
B) xy^2
C) 5xy

 

Solution:

 

xY^2 is postive. So out of scope

X^2 Y has min value of 4 * -8 = - 32

and 5xy can have min value of 5*2* -8 = - 80

(I know they arent equal. But by approaximation it can be inferred)

Also y has to be of odd degree and thn maximise x.

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