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Find 
(f@g)(-4) for the following functions.

f(x)=4x-2" and "g(x)=x^(2)
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(f@g)(-4)=

\newlineFind (fg)(4) (f \circ g)(-4) for the following functions.\newlinef(x)=4x2 and g(x)=x2 f(x)=4 x-2 \text { and } g(x)=x^{2} \newlineAnswer\newlineHow to enter your answer (opens in new window)\newline(fg)(4)= (f \circ g)(-4)=

Full solution

Q. \newlineFind (fg)(4) (f \circ g)(-4) for the following functions.\newlinef(x)=4x2 and g(x)=x2 f(x)=4 x-2 \text { and } g(x)=x^{2} \newlineAnswer\newlineHow to enter your answer (opens in new window)\newline(fg)(4)= (f \circ g)(-4)=
  1. Understand Function Composition: First, we need to understand what (f@g)(x)(f@g)(x) means. The notation (f@g)(x)(f@g)(x) represents the composition of the functions ff and gg, which means we first apply gg to xx, and then apply ff to the result of g(x)g(x). So, (f@g)(x)=f(g(x))(f@g)(x) = f(g(x)). Let's start by finding g(4)g(-4).
  2. Calculate g(4)g(-4): Calculate g(4)g(-4) by substituting xx with 4-4 in the function g(x)=x2g(x) = x^2.\newlineg(4)=(4)2=16g(-4) = (-4)^2 = 16.
  3. Find (f@g)(4)(f@g)(-4): Now that we have g(4)g(-4), we can find (f@g)(4)(f@g)(-4) by applying ff to the result of g(4)g(-4). So we need to substitute xx with 1616 in the function f(x)=4x2f(x) = 4x - 2.\newlinef(g(4))=f(16)=4(16)2f(g(-4)) = f(16) = 4(16) - 2.
  4. Calculate f(16)f(16): Calculate f(16)f(16) by multiplying 44 with 1616 and then subtracting 22.\newlinef(16)=4(16)2=642=62f(16) = 4(16) - 2 = 64 - 2 = 62.

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