I am proving something, and I want to know how to rewrite a formula like this one: a^x - b^x, where you know that b<a.
Is there any way to write this differently? Maybe with sumformula, or an easy powerrule...anything?
Okay well, my assignment is getting near the solution, but not yet. So I now have and found out that if a = a+1, then b = a. so...now I have
And yeah, okay. How can I rewrite this one? I don't think it's neccesary to give the whole rewriting, but a hint? (Or the whole rewriting is okay, I can stop myself from looking first and try it out myself).