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Consider the functions c( ) 3 sin osx xf x += where 0 ≤ x ≤ π and g (x) = 2x where x ∈  .(a) Find ( f  g)(x) .

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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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