fe If oth term of an A.P is - and t...
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fe If oth term of an A.P is - and th term is --. Then prove that sum р of pq terms is ž (pq+1)

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wim of pq terms ( =frac{p q}{2}{2 a+(p q-1) d} ) ( =frac{p q}{2}left{frac{2}{p q}+frac{p q-1}{p q}right}=frac{p q+1}{2} )
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