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# LaGrange Multipliers Help 2 watch

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1. Here is a question I have been given in my exams:

,

I have an answer but as I have no resources to check it against, I am posting my answers on here to try and get some extra help. Here is my answer:

a)

So

Call this equation (1).

Call this equation (2).

(1)=(2)

Call this (3).

(3)=(2)

So:

This gives:

I think this is the correct method, I do not however know how to tackle b. Thanks for any help!
2. (Original post by Happy2Guys1Hammer)
Here is a question I have been given in my exams:

,

I have an answer but as I have no resources to check it against, I am posting my answers on here to try and get some extra help. Here is my answer:

a)

So

Call this equation (1).

Call this equation (2).

(1)=(2)

Call this (3).

(3)=(2)

So:

This gives:

I think this is the correct method, I do not however know how to tackle b. Thanks for any help!
Form three triangles by joining P to the three vertices. What are the areas of these triangles? Add them up to get the given expression.

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Updated: July 19, 2013
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