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5 votes
Let f(x) = 5x + 12. Find f-1 (x).

2 Answers

5 votes

f(x)=5x+12\\\\ f^(-1)(x):\\ y=5x+12\ \ \ |Subtract\ 12\\ y-12=5x\ \ \ |Divide\ by\ 5\\ (y-12)/(5)=x\\\\ f{-1}(x)=(x-12)/(5)
User Radu Cugut
by
7.5k points
3 votes

Answer:

f^-1(x) = x/5 - 12/5

Explanation:

f(x) = 5x + 12

y = 5x + 12

x = 5y + 12

5y = x - 12

y = x/5 - 12/5

f^-1(x) = x/5 - 12/5

User Eckig
by
7.9k points

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