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Find the sum of first 15 terms of the A.P 8,7¼,6½,5¾ |
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Answer» Answer: a= 8 and d=3/4 and n=15 Sn = n/2[2a+(n-1)d] S15=15/2(2×8+14×3/4) =15/2((32+21) /2) =15/2(53/2) =795/4 =198.75 or 198 3/4 Step-by-step explanation: I HOPE that it will be helpful for you |
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