The sum of n numbers in Geometric progression is:
a1 is first number in progresion
q is the common ratio.
In your case:
S8=32*( -255)/( -1)
I am not shure that this question have solution.
Geometric progression in this case:
In first question:
In a geometric progression,the product of the 2nd and 4th terms is double the 5th terms and the sum of the first four terms is 80.find the gp
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