Hi all, I'm having trouble with the following problem: It was given as a word problem from which to infer the mathematics but basically it is this:(adsbygoogle = window.adsbygoogle || []).push({});

Maximize: f(x,y,z,t,w)=

ln((y^2-x^2)(z^2-t^2)*w^3)+.8x-1.2y-20z/17+14t/17-w^3/(pi^3)

Subject to the constraints:

0<= .5x+y+3z+3y+2.5w<+30

1800<=+130x+150y+200z+70t+110w<=3000

the problem is I don't know how to handle constraints like these, where there is an upper and lower bound, and i'm just confused because it seems like there is a lot going on...the only thing i knew how to do to

1) remark that the max exists because the function is defined on this closed and bounded set 2) compute all of the partials set them equal to zero and find the critical points and hope that I would find the global max and the values at the global max would lie inside the constraints, but this didn't work because when I do this I get the critical point

(2,3,7/3,10/3,pi) which doesn't satisfy the second constraint.

I know that when you have a function defined on a closed bounded set to find the local max you find the crit. points and test the values at the boundaries and just compare but i don't know how to obtain bounds on each individual variable from the constraints or what to do. any help would be appreciated

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# Homework Help: Optimization With Inequality Constraints: Please Help

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