Q. For the function f(x)=3x31, find f−1(x).f−1(x)=3x3f−1(x)=(3x)31f−1(x)=3x3f−1(x)=(3x)3
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=3x31
Switch x and y: Now, switch x and y to find the inverse: x=3y(1/3)
Isolate y: To solve for y, we need to isolate y on one side of the equation. Start by dividing both sides by 3:3x=y31
Eliminate cube root: Now, raise both sides of the equation to the power of 3 to eliminate the cube root: (3x)3=(y31)3
Simplify and find inverse: Simplifying both sides gives us: egin{equation}(\frac{x}{3})^3 = y\end{equation}
Simplify and find inverse: Simplifying both sides gives us:(3x)3=yWe have now isolated y and found the inverse function:f−1(x)=(3x)3
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