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If a=(sqrt(5)+1)/(sqrt(5)-1) and b=(sqrt...

If `a=(sqrt(5)+1)/(sqrt(5)-1)` and `b=(sqrt(5)-1)/(sqrt(5)+1)` , the value of `((a^2+a b+b^2)/(a^2-a b+b^2))` is `3/4` (b) `4/3` (c) `3/5` (d) `5/3`

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