Find the sum of the first 25 terms of the geometric series16-48 144 -4 – InterviewSolution

1.

Find the sum of the first 25 terms of the geometric series16-48 144 -432+...

Answer»

here a = 16 r = -48/16 = -3

and n = 25 termsso S25 = 16(1-(-3)^25)/1-(-3) = 4(1+3^25) so sum will be 3389154437776.

its wrong

just now checked its correct think u

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