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find the common difference of an ap if first term is 5 and the sum of the first 4 terms is 1/2 the next four terms |
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Answer» ONG>Step-by-step EXPLANATION: a=5. (a+a+d+a+2d+a+3d)=½(a+4d+a+5d+a+6d+a+7d) (4a+6d)=½(4a+22d) 4a+6d=3a+11d 4×5-3×5=11d-6d 20-15=5d 5d=5 d=5/5 d=1. |
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