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If x=(sqrt(5)+sqrt(3))/(sqrt(5)-sqrt(3))...

If `x=(sqrt(5)+sqrt(3))/(sqrt(5)-sqrt(3))` and `y=(sqrt(5)-sqrt(3))/(sqrt(5)+sqrt(3))`, then `(x+y)` equals (a) `2(sqrt(5)+sqrt(3))` (b) `2sqrt(15)` (c) 8 (d) 16

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