Question

the population of a type of local dragonfly can be found using an infinite geometric series where a1= 65 and the common ratio is 1/6. find the sum of this infinite series tht will be the upper limit of this population.

Answer 1

Sum of  infinite series of a GS  is  a1 / (1-r)

so here it is  65 / (1 - 1/6)  =  65 / 5/6  = 65*6 / 5 = 78  answer