Question

Find the sum of the series
it is in gp

Answer 1

common ratio is root of(3)
sum of 8 terms in series =a(r^n-1)/r-1
                                        =1/√3(3^4-1)/(√3-1)
                                        =1/√3(80)(√3+1)/2
                                        =40(√3+1)/√3