The number (1+sqrt 5)/2 is known as the golden ratio, and shows up in various natural solutions. The ancient Greeks used this number as a guide in their architectural designs for the ratio of width to height for building fronts.
what is the conjugate expression for the golden ratio?
my answer is 1-sqrt of 5 but the book says (1-sqrt 5)/2..
can someone explain it to me..

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(a+b)/b = b/a
just put b/a = x and solve for it's two values.

can explain further please?

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