The correct answer is (C):
f [f(2x) + g(x2)]
as x = 1,
f [f(2) + g(1)]
= f [22 + 21]
= f [6] = 62
= 36
Let A be the set of 30 students of class XII in a school. Let f : A -> N, N is a set of natural numbers such that function f(x) = Roll Number of student x.
Give reasons to support your answer to (i).
Find the domain of the function \( f(x) = \cos^{-1}(x^2 - 4) \).