Q. For the function f(x)=10+3x7−4x, find f−1(x).Answer: f−1(x)=
Replace with y: To find the inverse function, f−1(x), we need to switch the roles of x and y in the original function and then solve for y. Let's start by replacing f(x) with y to make it easier to work with.y=10+3x7−4x
Switch x and y: Now, switch x and y to find the inverse function.x=10+3y7−4y
Multiply both sides: Next, we need to solve for y. To do this, we'll multiply both sides of the equation by (10+3y) to get rid of the fraction.x×(10+3y)=7−4y
Distribute x: Distribute x on the left side of the equation.10x+3xy=7−4y
Move terms with y: Now, we want to get all the terms with y on one side and the constant terms on the other side. Let's move the terms involving y to the left side and the constant to the right side.3xy+4y=7−10x
Factor out y: Factor out y from the left side of the equation.y(3x+4)=7−10x
Divide both sides: Now, divide both sides by (3x+4) to solve for y.y=3x+47−10x
Find inverse function: We have found the inverse function. Therefore, the inverse function f−1(x) is:f−1(x)=3x+47−10x
More problems from Simplify variable expressions using properties