Question

The population of a local species of dragonfly can be found using an infinite geometric series where a1 = 30 and the common ratio is two fifths. Write the sum in sigma notation and calculate the sum that will be the upper limit of this population.

Answer 1

The answer is the summation of 30 times two fifth of the i minus 1 power from equation equals to 1, the sum is 50.

Step-by-step explanation:

S = a ÷ (1-r)

S = 30 ÷ (1- (2÷5))

S = 50.

The sum is 50.

By sigma notation verifies 30.