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OpenStudy (anonymous):
What is the sum of this geometric series? a. 511 b. 512 c. 1020 d. 510 e. 255
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OpenStudy (anonymous):
OpenStudy (anonymous):
its 2*(2^8 -1) =2(256-1)=2*255=510
OpenStudy (anonymous):
here a=2 and r=2 and n=8 use s=a(r^n -1)/(r-1)
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