Core 2 exam May 22nd

I have a question about geometric series

If you have a number to the power of (n-1) how do you change it to be to the power of n and how does this affect the 'a' value

thanks

Reply 1

TheAnnabelle

I don't understand what you mean by "a" value but if you have number to the power of "n-1", say p:

=p^(n-1)
= p^n x p^-1
=p^n / p

Hope this is clear enough!

Reply 2

Hunkybm

Original post by TheAnnabelle

I don't understand what you mean by "a" value but if you have number to the power of "n-1", say p:

=p^(n-1)
= p^n x p^-1
=p^n / p

Hope this is clear enough!

Cheers, it did! I meant in geometric series I've seen questions where you change the r^n-1 to r^n so how does affect the a value! as in the first value (u1)

but that's cleared it up, appreciate it. :smile: