Q
A.P 7,14,21 Ka kaon
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पदों का योग
952 hoga ?
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an = a+(n-1)d. (d =14-7=7
952=7+(n-1)7
952-7=n-1)7
945=(n-1)7
945/7= n-1
135 =n-1
n =135+1=136
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