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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 that will be the upper limit of this population. A. 78 B. 28 C. 11 D.32

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do u know the general form of a geometric series with a1 and the common ratio?
an = a1(CR)^n
What is the C?

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why u said the ans is C?
No i mean you put in the formula the letter c
Oooo sorry i mean to say an = a1*(Common Ratio)^n
Oh okay . What woud the 'an' be though a1= 65 and cr = 1/6 How would you find an or letter n
Geometric series is a series of numbers... 1st no. = a1 2nd no. = a2 = a1*CR 3rd no. = a3 = a2*CR=a1*CR*CR .... nth no.=an=a1*(CR)^n
U may need to read up on geometric series before u can do this prob. plz read ur study material or check out wikipedia:
yes @Lala3712 so do u understand what a geometric series is now?

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