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Find (fg)(0)(f \circ g)(0).\newline\begin{align*} &f(x) = x + 5,\ &g(x) = x^{2} + 3,\ &(f \circ g)(0) = \end{align*}

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Q. Find (fg)(0)(f \circ g)(0).\newline\begin{align*} &f(x) = x + 5,\ &g(x) = x^{2} + 3,\ &(f \circ g)(0) = \end{align*}
  1. Understand Function Composition: Understand the composition of functions. The composition of two functions (fg)(x)(f \circ g)(x) means that we first apply gg to xx, and then apply ff to the result of g(x)g(x). In mathematical terms, (fg)(x)=f(g(x))(f \circ g)(x) = f(g(x)).
  2. Calculate g(0)g(0): Calculate g(0)g(0).\newlineWe need to find the value of g(x)g(x) when x=0x = 0. Since g(x)=x2+3g(x) = x^2 + 3, we substitute xx with 00.\newlineg(0)=(0)2+3=0+3=3g(0) = (0)^2 + 3 = 0 + 3 = 3.
  3. Calculate f(g(0))f(g(0)): Calculate f(g(0))f(g(0)). Now that we have g(0)=3g(0) = 3, we need to find f(g(0))f(g(0)) which is f(3)f(3). Since f(x)=x+5f(x) = x + 5, we substitute xx with 33. f(3)=3+5=8f(3) = 3 + 5 = 8.
  4. Conclude (f@g)(0)(f@g)(0): Conclude the value of (f@g)(0)(f@g)(0). We have found that f(g(0))=f(3)=8f(g(0)) = f(3) = 8. Therefore, (f@g)(0)=8(f@g)(0) = 8.

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