f(x) = 2 + 3^{x }What is f(2x) - f(x)?
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It's embarrassing to ask about this question, but I can't remember how to solve it for the life of me.
Thanks in advance.
No. f(x) is a notation that says "the function operated on the value x". Here we are told $\displaystyle \displaystyle \begin{align*} f(x) = 2 + 3^x \end{align*}$, which says that whatever value you put in, is what you will raise 3 to the power of, and then add 2 to. So if instead we put in 2x we get f(2x). If the same function operates on 2x (so this is what we raise 3 to the power of and then add 2 to), what will we get?