Which book should I prefer for my physics class 11th revision?. I am appearing for JEE 2018?
Which book should I prefer for my physics class 11th revision?. I am appearing for JEE 2018?

Let S={x:x belongs to R(√3+√2)^(x^2-4) - (√3-√2)^(x^2-4)=10}. Then n(S) is equal to-
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