In this case, the text book has included the answer. I have 3^n/2, they have just 3^n. Can someone help me figure out how to factor out the 2? Thank you.
In this case, the text book has included the answer. I have 3^n/2, they have just 3^n. Can someone help me figure out how to factor out the 2? Thank you.
You're very close, it is that last simplification that is wrong - the laws of exponents do not work like that. Use the law that says $\displaystyle a^{b+c} = a^ba^c$ to express $\displaystyle 3^{n+1}$ in terms of $\displaystyle 3^n$