Questions
Let be the rth term of an AP, for 2…. . If for some positive integers m and n, we have and
the equal
detailed solution
Correct option is C
Let a be the first term and d be the com-mon difference of the given A.P. Then according to thehypothesis, Tm−Tn=1n−1m⇒ (m−n)d=m−nmn⇒d=1mn.⇒ Tm+n−Tm=(m+n−m)1mn=1mSimilar Questions
The sum of terms of an is The number of term which equals 159, is
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