find the sum of first n terms of a series whose nth term can be given bytn=n/(n4+4)
Ankit Jaiswal , 8 Years ago
Grade 12
Magical Mathematics[Interesting Approach]> find the sum of first n terms of a series...
1 AnswersVikas TU
Last Activity: 7 Years ago
To find the sum:
First term is given by , put n=1,
find t2,put n=2,
d= t2-t1=1/10-1/5=-1/10
sum of first n terms =n/2(2a+(n-1)d)
=n/2(2(1/5)+(n-1)(-1/10))
=(5n-4n2)/20.
So this would be the sum of the first n terms from the give tn.
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