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Given a = 8, an = 62, sn = 210, find n and d. |
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Answer» n=6and d=10.8 Sn =n/2(a+An) 210 =n/2(8+62)210=n/2*70210*2/70=nn=6an=a+(n-1)d62=8+(6-1)d62-8/5=dd=54/5=10.8 n=6d=10.8 n=6 and d=10.8 n=6d=10.8 i think n will be 105/4 |
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