Sir can you give me the name of best books for the preparation of IIT-JEE?
Sir can you give me the name of best books for the preparation of IIT-JEE?

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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