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iv been workin on this problem its kind of awkward check it out

{an} is a decreasing sequance, an>=0 and there is a convergent series Sn with terms an

we need to prove that the limit of nan is 0

i first started of a sequence bn=an+1+an+2+.......+a2n

then I showed that the limit of bn is also 0 where do i go from here

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# Convergent series

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