Q. Find the inverse function of the function f(x)=4x79 on the domain x≥0.f−1(x)=(4x)−97f−1(x)=(4x)97f−1(x)=4x−97f−1(x)=4x97
Understand the problem: Understand the problem.We need to find the inverse function of f(x)=4x(9/7). The inverse function, denoted as f−1(x), will undo the operation performed by f(x). To find the inverse, we will switch the roles of x and y and solve for y.
Write original function: Write the original function with y instead of f(x).Let y=4x(9/7). This is the first step in finding the inverse function.
Swap x and y: Swap x and y to find the inverse.Now, we replace y with x and x with y to get x=4y(9/7).
Solve for y: Solve for y.To isolate y, we need to get rid of the coefficient 4 and the exponent (9/7). We start by dividing both sides by 4, which gives us x/4=y(9/7).
Take to power: Take both sides to the power of (7/9) to cancel the exponent on y. Raise both sides of the equation to the power of (7/9) to get (x/4)(7/9)=y.
Write inverse function: Write the inverse function.Now that we have y by itself, we can write the inverse function as f−1(x)=(4x)97.
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