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What is the inverse of the function f(x)=4x+8
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1 vote
What is the inverse of the function f(x)=4x+8

User Wvp
by
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2 Answers

2 votes
Switch the x and y

X= 4y +8

Subtract 8 from both sides

X-8 = 4y

Divide both sides by 4

So,

f^-1(x)= x-8/4
User Vyacheslav Karpukhin
by
5.5k points
4 votes
Step 1: change f(x) to y
y = 4x + 8

Step 2: switch x and y in the equation
x = 4y + 8

Step 3: solve for y
x - 8 = 4y

(x)/(4) -2=y

f^(-1) (x)= (x)/(4)-2
User Brick Yang
by
4.9k points
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