the sum of some terms of a GP is 315 whose 1st term is 5 and common ratio is 2 . find the last term and the number of terms
ManalishaYesmin:
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5 + 10+ 20+40+80+160=315
SO LAST TERM = 160
NO OF TERMS= 6
SO LAST TERM = 160
NO OF TERMS= 6
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