Question: [ 0 / 1 Points ] SPRECALC 7 1 The first term of a geometric sequence is 2 5 , and the fourth term is

[0/1 Points]
SPRECALC71
The first term of a geometric sequence is 25, and the fourth term is 15.
(a) Find the common ratio r.
r=
Find the fifth term.
a5=
(b) Find the partial sum of the first eight terms.
S8=
[0/1 Points] SPRECALC71 The first term of a geometric sequence is

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