Q. For the function f(x)=(5x)31, find f−1(x).f−1(x)=(5x)3f−1(x)=5x3f−1(x)=(5x)3f−1(x)=(5x)31
Rewrite function with 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. Let's start by rewriting the function with y instead of f(x):y=(5x)31
Switch x and y: Now, we switch x and y to find the inverse: x=(5y)31
Isolate y: Next, we want to isolate y. To do this, we'll raise both sides of the equation to the power of 3 to get rid of the cube root: x3=(5y)(31)3
Raise both sides to power of 3: When we raise a power to a power, we multiply the exponents. Since (31)×3=1, the cube root and the power of 3 cancel each other out, leaving us with: x3=5y
Multiply both sides by 5: Now, we multiply both sides by 5 to solve for y:5×x3=y
Find inverse function: We have found the inverse function. The inverse function, f−1(x), is: f−1(x)=5x3
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