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?
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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 $\displaystyle n$ replaced by $\displaystyle (n+1)$. Grandad
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