problem: http://www.chegg.com/homework-help/calculus-early-transcendentals-2nd-e

Question

problem: http://www.chegg.com/homework-help/calculus-early-transcendentals-2nd-edition-chapter-14.8-problem-9e-solution-9781429231848

things to be explained: (just why do they set x and y to 0, and why is that a critical point.) it seems like once you find lambda you should set them equal to each other, which they did in the next step. but for some reason they first set x and y to 0.

Things to be explained: (just why do they set x and y to 0, and why is that a critical point.) it seems like once you find lambda you should set them equal to each other, which they did in the next step. but for some reason they first set x and y to 0.

Explanation / Answer

(a) in the previous step u have the equation as 2x=4*(lambda)*x^3 and same for y . x=0 is an ovious solution for it , isn't it? that's why the steps.similarly for y

(b) i believe this aprt is clear from the explanatio of part a , bacuse u have to plug in all solutions to get all the critical points.

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