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OpenStudy (anonymous):
Find t9 for the geometric sequence: 189, 63, 21, 7, … Give your answer as a decimal to the nearest hundreth
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OpenStudy (anonymous):
r=3 a=189
OpenStudy (dumbcow):
r= 1/3, series is decresing
OpenStudy (anonymous):
equation t(9)=189(1/3)*(9-1)
OpenStudy (dumbcow):
\[a_{n} = a_{1}*r^{n-1}\]
OpenStudy (angela210793):
189/63=3 t9==t1*r^(n-1)=189*1/3^8
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OpenStudy (anonymous):
is it 0.03
OpenStudy (anonymous):
is 0.03 right
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