CBSE Class 11-science Answered
if there are m A.P.'s beginning with unity whose common difference are 1,2,3.....m respectively, show that the sum of their nth terms is 1/2m(mn-m+n+1).
Asked by aashu.60 | 24 Aug, 2015, 09:01: AM
Expert Answer
Answered by Vimala Ramamurthy | 24 Aug, 2015, 11:24: AM
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