QuestionAugust 27, 2025

30 Given f(x)=(2)/(3)x+6 write the equation of f^-1(x)

30 Given f(x)=(2)/(3)x+6 write the equation of f^-1(x)
30 Given f(x)=(2)/(3)x+6
write the equation of f^-1(x)

Solution
4.6(242 votes)

Answer

f^{-1}(x) = \frac{3}{2}x - 9 Explanation 1. Swap Variables Replace f(x) with y: y = \frac{2}{3}x + 6. Swap x and y: x = \frac{2}{3}y + 6. 2. Solve for y Subtract 6 from both sides: x - 6 = \frac{2}{3}y. Multiply by \frac{3}{2}: y = \frac{3}{2}(x - 6). 3. Simplify Distribute: y = \frac{3}{2}x - 9.

Explanation

1. Swap Variables<br /> Replace $f(x)$ with $y$: $y = \frac{2}{3}x + 6$. Swap $x$ and $y$: $x = \frac{2}{3}y + 6$.<br />2. Solve for y<br /> Subtract 6 from both sides: $x - 6 = \frac{2}{3}y$. Multiply by $\frac{3}{2}$: $y = \frac{3}{2}(x - 6)$.<br />3. Simplify<br /> Distribute: $y = \frac{3}{2}x - 9$.
Click to rate: