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Formula to find sum of nth term of an AP. |
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Answer» n/2 [ 2a + (n-1) d ] for last term n/2 [ a+ l] Sn=n/2(a+l) An = n/2 +(a+(n_d)) Sn =n/2( 2a +(n -1 )d Sn=n/2(2a+(n-1)d) An= a+(n-1) * d |
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