Let a, b, c be positive real number satisfying:

Prove that

Find all real numbers k and m and satisfying:

with all non-negative.

Solve this equations:

and

Thank you very much!

- April 10th 2010, 12:13 AMsmallchicken1205Solving simultaneous equation and inequation subject to constraints.
Let a, b, c be positive real number satisfying:

Prove that

Find all real numbers k and m and satisfying:

with all non-negative.

Solve this equations:

and

Thank you very much! - April 10th 2010, 04:54 AMmathemagister
This looks a lot like homework. Please show us what you have done so far to show that you have at least attempted something. Then ask here about the parts you are stuck on. That way, you are following MHF Policy.

Also, don't ask more than 2 questions in the same thread, which potentially makes the thread difficult to follow.

Thanks

Mathemagister

PS Sorry if I sound too admin-like. - April 10th 2010, 05:30 AMsmallchicken1205
About asking more than 2 questions in the same thread, sorry, I'll extract experience.

I think in 1st problem, maybe it must be

In 2nd and 3rd problems, I have no orientation, I hope I can receive assistance from you, thank you

(I study English not well, if it isn't true, I hope you can understand me)