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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- Jan 13th 2010, 05:49 AMTigerValue of Integers
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 - Jan 13th 2010, 06:21 AMDinkydoe
Observe that

This gives:

Let . Thus solve for x and determine the digit closest to x.