7. Show that z = xy(x, y ≥ 0) is not quasiconvex.

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter2: Mathematics For Microeconomics
Section: Chapter Questions
Problem 2.6P
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7. Show that z = xy(x, y20) is not quasiconvex.
8. Use bordered determinants to check the following functions for quasiconcavity and
(b): z-(x+1)²-(y + 2)² (x,y> 0)
quasiconvexity:
(a) z=-x² - y² (x, y > 0)
2
Transcribed Image Text:7. Show that z = xy(x, y20) is not quasiconvex. 8. Use bordered determinants to check the following functions for quasiconcavity and (b): z-(x+1)²-(y + 2)² (x,y> 0) quasiconvexity: (a) z=-x² - y² (x, y > 0) 2
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