Q. Find the inverse function in slope-intercept form (mx+b) :f(x)=−2x+4Answer: f−1(x)=
Replace with y: To find the inverse function, we first replace f(x) with y to make the equation easier to work with.So, we have y=−2x+4.
Swap x and y: Next, we swap x and y to find the inverse function. This means we replace every x with y and every y with x. So, we get x=−2y+4.
Isolate y: Now, we need to solve for y to get it in the form y=mx+b, which is the slope-intercept form.First, we add 2y to both sides to start isolating y.This gives us x+2y=4.
Subtract x: Next, we subtract x from both sides to continue isolating y. This gives us 2y=4−x.
Divide by 2: Finally, we divide both sides by 2 to solve for y. This gives us y=24−x.
Simplify equation: Simplify the equation to get it into slope-intercept form.This gives us y=−21x+2.
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