is defined as the function
and denied
o )
for alle.
emple 1.20 Find f g and go when - 2
and g.) = -2
Solution f(n) = 2 + 1 g(x) = 2
s o g(x) = f(g(x)) = f(x - 2) - 27-2) + 1 = 2x
go f() = g(f(x)) = g(2x + 1) = (2x + 1) - 2 =
Thus f og = 2.0 - 3, go f = 4x + 4x - 1. From
Note
> Generally, fog+go f for any two function
not commutative.
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