The geometric sequence Tn
is given by 9,3,1,13,...
.
1. Find a general expression for the nth
term of Tn
in terms of n
, giving your answer in the form p⋅qn−1
, where p,q∈Q
.
an=
2. Find the sum of the first 9
terms. Give your answer correct to 2 decimal places:
∑n=19Tn=
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