Thread: Sequences

a normal geometric sequence is:
un=u1*(r^n-1)

but a compound interest geometric sequence is:
u(n+1)=u1*(r^n)

how do i know when to use which?

Hello juliak

Originally Posted by juliak

a normal geometric sequence is:
un=u1*(r^n-1)

but a compound interest geometric sequence is:
u(n+1)=u1*(r^n)

how do i know when to use which?

These define the same sequence. The second is simply the first with replaced by .

Grandad