Q. What is the inverse of the functionf(x)=−21(x+3)?f−1(x)=□
Switch Roles and Solve: To find the inverse of the function f(x)=−21(x+3), we need to switch the roles of x and f(x) and then solve for the new x. Let y=f(x), so we have y=−21(x+3). Now, replace y with x to get x=−21(y+3).
Replace y with x: Next, we need to solve for y. Start by multiplying both sides of the equation by −2 to get rid of the fraction.−2x=y+3
Multiply by −2: Now, subtract 3 from both sides to isolate y.−2x−3=y
Isolate y: Finally, we write the inverse function by replacing y with f−1(x).f−1(x)=−2x−3