Let u and v be two positive real numbers satisfying the two equations u+v+uv=10 and u^2 +v^2=40. What is the value of integer closest to u+v? a)4 b)5 c)6 d)6 e)8
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Observe that This gives: Let . Thus solve for x and determine the digit closest to x.
Last edited by Dinkydoe; Jan 13th 2010 at 05:40 AM. Reason: switched +/-
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