Let f, g : R → R+ defined by f (x) = 2x + 3 and g(x) = x2. Find (f ◦ g)(x) and (g ◦ f )(x)

Question

Let f, g : R → R+ defined by f (x) = 2x + 3 and g(x) = x2. Find (f ◦ g)(x) and (g ◦ f )(x)
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Solution 1

To find the composition of two functions, you substitute the output of one function into the other function.

  1. For (f ◦ g)(x), you substitute g(x) into f(x).

    So, f(g(x)) = f(x^2) = 2x^2 + 3.

  2. For (g ◦ f)(x), you substitute f(x) into g(x).

    So, g(f(x)) = g(2x + 3) = (2x + 3)^2.

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Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
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