Asked by Alice

Express the um using sigma notation:

1 +3/4 +5/9+ 7/16+ 9/25

Answers

Answered by oobleck
what, you don't recognize
1,3,5,7,9,...
1,4,9,16,25,...
??
∑ (2k-1)/k^2
Answered by Anonymous
maybe
a(1) = 1
a(n+1) = (a(n)+2)/n^2
sum = sigma from n=1 to n = 5 of a(n)
Answered by Anonymous
oobleck gave better answer.
Answered by Alice
Thank you very much :)
Answered by 4TheLoveOfPhysics
What oobleck said, but with the upper and lower limits will give:

n=5
∑ (2k-1)/k^2
n=1
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