Asked by NADIA
If the nth partial sum of
an is sn=(3n-2)/(n+1)
what is an when x>1?
and what is the sum of an?
an is sn=(3n-2)/(n+1)
what is an when x>1?
and what is the sum of an?
Answers
Answered by
Steve
I assume that Sn = sum(1..n) An, so Sn -> 3
Dunno where the x comes from, but if you mean when n > 1,
An = Sn - s(n-1)
= (3n-2)/(n+1) - (3(n-1)-2)/(n-1+1)
= 5 / n(n+1)
Dunno where the x comes from, but if you mean when n > 1,
An = Sn - s(n-1)
= (3n-2)/(n+1) - (3(n-1)-2)/(n-1+1)
= 5 / n(n+1)
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