Q. For the function f(x)=3+x9−5x, 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=3+x9−5x
Interchange x and y: Now, interchange x and y to find the inverse function.x=3+y9−5y
Multiply both sides: Next, we need to solve for y. To do this, we'll multiply both sides of the equation by (3+y) to eliminate the fraction.x(3+y)=9−5y
Distribute x: Distribute x on the left side of the equation.3x+xy=9−5y
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 term with y on the left side to the right side by adding 5y to both sides.3x+xy+5y=9
Combine like terms: Combine like terms on the left side.3x+y(x+5)=9
Factor out y: To isolate y, we need to factor it out from the terms on the left side.y(x+5)=9−3x
Divide both sides: Now, divide both sides by (x+5) to solve for y.y=x+59−3x
Replace y with f−1(x): We have found the inverse function. So, we can replace y with f−1(x) to express our answer.f−1(x)=x+59−3x
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