Grade 11Algebra
Find the sum of n terms 13/1+13+23/1+3+13+23+33/1+3+5+....
Find the sum of n terms 13/1+13+23/1+3+13+23+33/1+3+5+....
1 Answer
Arun
Approved Tutor Answer8 Years agoDear Sameer
For nth term
Tn = (1³ + 2³ +3³+..,..+n³)/(1 +3+5+....(2n-1))
Tn = n²(n+1)²/[4 *(n/2)(2n)]
Tn = (n+1)²/4
Tn = (n² + 1 + 2n) /4
Now
Sn = sigma Tn
Now you can solve
Regards
Arun (askIITians forum expert)
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