Math Is Fun Forum

Thanks mathsyperson ...just btw what are power laws? Maybe I know but perhaps the translation differs in my language from english so I dont know what it should be exactly.

Can I do it also this way(?):

according to the rule that [x^a * x^r = x^{a+r}] so that our example will be like [2^x * 2^3]/[2^x * 2^-1] and that this way the [2^x] will cancel each other out and we will get [2^3]/[2^-1] which equals eventually [16] ...