I am having trouble understanding this... I can't remember whose notes this is from, but it is something I printed off this site.
7^4 + 7^7
In both instances I am confused with what happens to the one in the second to last step. Wouldn't it be 3^4+3^4(256)? It seems like the 1 just disappears???
Here is a problem I can not solve:
2^x - 2^x-2 = 3(2^13)
The answer is 15 but I do not understand how to get it. Is there a good guide online or does someone have good notes for exponents? I am lacking in this area and I need it dumbed down.
(so again the answer given in your example is not correct).