- #1
lionely
- 576
- 2
Homework Statement
I am having problem with number 16ii)
Homework Equations
log([x+y]/sqrt5)
The Attempt at a Solution
Sorry still not used to latex
So I tried this
if x/y + y/x =3 then(
(x^2 + y^2)/xy = 3xy
x^2 + y^2 = 3xy
(x-y)^2 = xy
(x-y) = sqrt(xy)
(x-y)(x+y) = sqrt(xy)(x+y)
(x+y) = (x^2-y^2)/sqrt(xy)
But subbing in the new expression for (x+y) did not help me at all I end up getting the same thing over and over.