The population of a local species of dragonfly can be found using an infinite geometric series where a1 = 42 and the common ratio is three fourths. write the sum in sigma notation and calculate the sum that will be the upper limit of this population. the summation of three fourths times 42 to the i minus 1 power, from i equals 1 to infinity.; the sum is divergent. the summation of three fourths times 42 to the i minus 1 power, from i equals 1 to infinity.; the sum is 168. the summation of 42 times three fourths to the i minus 1 power, from i equals 1 to infinity.; the sum is divergent. the summation of 42 times three fourths to the i minus 1 power, from i equals 1 to infinity.; the sum is 168.