Consider the functions c( ) 3 sin osx xf x += where 0 ≤ x ≤ π and g (x) = 2x where x ∈ .(a) Find ( f g)(x) .
Question
Consider the functions
c(x) = 3 sin(osx) + xf(x)
where 0 ≤ x ≤ π
and
g(x) = 2x
where x ∈ ℝ
.
(a) Find (f ∘ g)(x)
.
Solution
To find the composition of two functions, (f o g)(x), you substitute g(x) into f(x).
Here, f(x) = 3sin(x) + x and g(x) = 2x.
So, (f o g)(x) = f(g(x)) = 3sin(g(x)) + g(x)
Substitute g(x) = 2x into the equation:
(f o g)(x) = 3sin(2x) + 2x
So, (f o g)(x) = 3sin(2x) + 2x is the composition of the two functions.
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