\(A geometric series $b_1+b_2+b_3+\cdots+b_{10}$ has a sum of $180$. Assuming that the common ratio of that series is $\dfrac{7}{4}$, find the sum of the series $b_2+b_4+b_6+b_8+b_{10}.$\)\(A geometric series $b_1+b_2+b_3+\cdots+b_{10}$ has a sum of $180$. Assuming that the common ratio of that series is $\dfrac{7}{4}$, find the sum of the series $b_2+b_4+b_6+b_8+b_{10}.$\)

Guest Feb 23, 2019

#1**+1 **

An infinite series with a common ratio > 1 diverges and does not have a sum.....are you sure you have the correct ratio in your question?

ElectricPavlov Feb 23, 2019