if i am unable to cross top 20 percentile in cbse 2013 ,then can i apply for iit 2014 by improvement in2014 cbse board?
if i am unable to cross top 20 percentile in cbse 2013 ,then can i apply for iit 2014 by improvement in2014 cbse board?

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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