SOLUTION: Hi, Please help me with this one: If {{{ (a + b)^.5 = (a - b)^-.5 }}}, which of the following must be true? The exponent is actually 1/2 (not .5), I just didn't know how to inp

Question 83881: Hi, Please help me with this one:
If , which of the following must be true? The exponent is actually 1/2 (not .5), I just didn't know how to input it using the plot formula. The answer is but I don't know why. Thanks!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If , which of the following must be true?
----------------
Rewrite as:
sqrt(a+b) = 1/sqrt(a-b)
Cross-mutiply to get:
sqrt(a^2-b^2)=1
Square both sides to get:
a^2-b^2 = 1
=================
Cheers,
Stan H.

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