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Dafna11 [192]
1 year ago
13

Can you help me it’s. 2 part question I can only add one picture at a time

Mathematics
1 answer:
snow_lady [41]1 year ago
8 0

Recall the definition of the composition between two functions:

(f\circ g)(x)=f(g(x))

Similarly, but not always the same:

(g\circ f)(x)=g(f(x))

Use the rules of correspondence of the functions f and g to find the compositions:

\begin{gathered} f(x)=6x-10 \\ g(x)=8-4x \end{gathered}

Then:

\begin{gathered} (f\circ g)(x)=f(g(x)) \\ =6\cdot g(x)-10 \\ =6(8-4x)-10 \\ =6\cdot8-6\cdot4x-10 \\ =48-24x-10 \\ =-24x+38 \\  \\ \therefore(f\circ g)(x)=-24x+38 \end{gathered}

On the other hand:

\begin{gathered} (g\circ f)(x)=g(f(x)) \\ =8-4\cdot f(x) \\ =8-4(6x-10) \\ =8-4\cdot6x-4\cdot-10 \\ =8-24x+40 \\ =-24x+48 \\  \\ \therefore(g\circ f)(x)=-24x+48 \end{gathered}

Therefore, the answers are:

\begin{gathered} (f\circ g)(x)=-24x+38 \\ (g\circ f)(x)=-24x+48 \end{gathered}

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