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alexandr1967 [171]
3 years ago
15

PLZ HELP: Write the inverse function for the function, ƒ(x) = 1/2x + 4. Then, find the value of ƒ -1(4). Type your answers in th

e box.

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = \frac{1}{2} x + 4 ( multiply through by 2 to clear the fraction )

2y = x + 8 ( subtract 8 from both sides )

2y - 8 = x

Change y back into terms of x with x = f^{-1} (x) , then

f^{-1}(x ) = 2x - 8

f^{-1}(4) = 2(4) - 8 = 8 - 8 = 0

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_____________________________________________________
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_____________________________________________________
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_________________________________________________________</span>  Note:
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______</span>_________________________________________________
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           Answer choice:  [D]:  </span>" x-int: 1 , y-int: 0.5  " .
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