Q. For the function f(x)=7(x+4), find f−1(x).f−1(x)=7(x+4)f−1(x)=7(x−4)f−1(x)=7x−4f−1(x)=7x−4
Write original function as 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. The original function is f(x)=7x+4, so we start by writing it as y=7x+4.
Replace y with x: Next, we replace y with x to reflect the inverse relationship: x=7y+4.
Solve for y: Now, we solve for y by multiplying both sides of the equation by 7 to get rid of the denominator: 7x=y+4.
Isolate y: Finally, we subtract 4 from both sides to isolate y: 7x−4=y.
Inverse function: Therefore, the inverse function, f−1(x), is f−1(x)=7x−4.
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