ahatoval wrote:
If a > 0, is 2/(a+b) + 2/(a-b) = 1?
(1) b = 0
(2) a^2 − b^2 = 4a
[Reveal] Spoiler:
My answer was D. I thought that STATEMENT 1 was SUFFICIENT to answer the question, because the question is not asking if the equation is 1 or not. It is asking if the info provided is SUFFICIENT to answer the question or not.
Thanks
Thanks
With algebra ds always try to see if you can rewrite the original equation to find the hidden inference/question
2(a-b) + 2(a +b) / a^2-b^2
2a-2b +2a +2b/a^2-b^2
4a/ a^2-b^2
St 1
We don't
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