Q. Find the inverse function in slope-intercept form (mx+b) :f(x)=−5x+20Answer: f−1(x)=
Understand Inverse Function: Understand the concept of an inverse function. An inverse function reverses the operation of the original function. If f(x)=y, then f−1(y)=x. To find the inverse function, we need to solve for x in terms of y.
Replace with y: Replace f(x) with y to prepare for finding the inverse.y=−5x+20
Swap x and y: Swap x and y to find the inverse function.x=−5y+20
Solve for y: Solve for y in terms of x.Add 5y to both sides and subtract x from both sides to isolate y.5y=20−x
Divide to solve: Divide both sides by 5 to solve for y.y=520−x
Simplify the equation: Simplify the equation.y=4−51xThis is the inverse function in slope-intercept form.
Replace with f−1(x): Replace y with f−1(x) to denote the inverse function.$f^{\(-1\)}(x) = \(4\) - \left(\frac{\(1\)}{\(5\)}\right)x
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