defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Relations and Functions Composition of Functions
If f(x) = ax - b and g(x) = cx + d are such that f(g(x)) = g(f(x)), then which one of the following holds ?
1
f(d) = g(b)
2
f(b) + g(d) = 0
3
f(a) + g(c) = 2a
4
f(d) + g(b) = 2d