Inverse function

When we do math, we often have to figure out what happens when we do something to a number. For example, if we have the number 2 and we add 3 to it, we get 5. This is easy to understand.

But what if we want to go the other way? What if we have the number 5 and we want to figure out what we added to it to get 2? This is where inverse functions come in.

An inverse function is like a magic machine that can undo whatever another function did. It's like a special calculator that can help us figure out what we need to do to a number to get back to where we started.

For example, let's say we have the function f(x) = x + 2. If we put in the number 3, we get 5 as the answer (3 + 2 = 5). But what if we want to go back? What if we want to figure out what number we started with if we know the answer is 5? This is where the inverse function comes in. The inverse of f(x) = x + 2 is g(x) = x - 2. If we put in 5 into g(x), we get 3 as the answer (5 - 2 = 3), which is what we started with.

So, an inverse function is like a magic calculator that can tell us how to undo a function. It's really helpful when we want to go backwards in math.