Q. Find the inverse function in slope-intercept form (mx+b) :f(x)=2x−8Answer: f−1(x)=
Understand Inverse Function Concept: Understand the concept of an inverse function. An inverse function essentially reverses the operation of the original function. If f(x) takes an input x and produces an output y, then the inverse function f−1(x) takes y as an input and produces the original x as an output.
Write Original Function: Write the original function.The original function is f(x)=2x−8. To find the inverse, we need to solve for x in terms of y.
Swap x and y: Swap x and y.To find the inverse function, we switch the roles of x and y. This means we will replace f(x) with y and then solve for x.So, we have y=2x−8.
Solve for x: Solve for x.Now we need to solve the equation y=2x−8 for x.Add 8 to both sides of the equation to isolate the term with x on one side: y+8=2x.
Divide by 2: Divide by ext{ extdollar}2 ext{ extdollar}.To solve for ext{ extdollar}x ext{ extdollar}, divide both sides of the equation by ext{ extdollar}2 ext{ extdollar}: ext{ extdollar}rac{y + 8}{2} = x ext{ extdollar}.
Write Inverse Function: Write the inverse function.Now that we have x in terms of y, we can write the inverse function. Replace x with f−1(x) and y with x to get the inverse function in terms of x.f−1(x)=2x+8.
Convert to Slope-Intercept Form: Convert to slope-intercept form.The slope-intercept form is y=mx+b. Our inverse function is already in this form, with m=21 and b=28.So, f−1(x)=21×x+4.
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