What is the formula used when in.a series the terms have common difference in AP...??! Share with your friends Share 0 Ankita Agarwal answered this Dear Student, Below are the formulas used if a series is in A.P.,To find the nth term of an AP Tn= a+n-1dTo find sum of n terms in a series =n22a+n-1d Below are the formulas used if the difference in a series forms an A.P.for example = 1,3,6,10,15,21,28,36 in this series the difference is 2,3,4,5 which forms an A.P. nth term Tn = n2+n2To find sum of n terms = nn+12n+16+nn+12 Regards 1 View Full Answer Fajar Faju answered this a+(n-1)?d 0 Mitali answered this No not this.. thus one is for the nth term of an AP 2 Basudeb Chatterjee answered this It cannot be told randomly, so please post such a problem in A.P. as the formula varies sum to sum and is to derived then only. Regards. 2 Charan Vijay😎🤓 1661 answered this a+(n-1)d 0 Mitali answered this For egg. 0 +2 +6 +12 +20 +...... till n 1 Basudeb Chatterjee answered this Hope this helps you. Regards. 2
