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2 September, 22:40

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.

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  1. 2 September, 22:49
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    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.

    Explanation:

    S = a : (1-r)

    S = 30 : (1 - (2:5))

    S = 50.

    The sum is 50.

    By sigma notation verifies 30.
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