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find the sum of a geometric series whose A1 = 3 whose An = 786 , 432 and whose common ratio is 4

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Lhuckyid
the formula for An=a1(r^n-1)
An=786,432
is in the 10th term of G.P
by getting the sum of it. this is the formula:
S=a1(r^n - 1)/r-1
substitute:
S=1048575...That's the answer..

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