Answered

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Which of the following equations gives a function f(x) that satisfies /5) = 127 o fix) = x-7 Ax cflx) = 5x + 12 + of) = x2 - 13 x) = 12x + 5 o )=x2 + 13

Sagot :

To find which function satisfies, f(5)=12, put x=5 for each function and check if the answer is 12.

[tex]\begin{gathered} f(x)=x-7 \\ f(5)=5-7 \\ =-2 \end{gathered}[/tex][tex]\begin{gathered} f(x)=5x+12 \\ f(5)=5\times5+12 \\ =37 \end{gathered}[/tex][tex]\begin{gathered} f(x)=x^2-13 \\ =5^2-13 \\ =25-13 \\ =12 \end{gathered}[/tex]

Therefore, f(5)=12 is satisfied by the function

[tex]f(x)=x^2-13[/tex]

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