Question

Express the sum using sigma notation
1+ 5/6+ 6/8+ 7/10 + 8/12

Answer 1

sigma (3+n)/(2+2n) n=1 to infinity

Answer 2

a) Σ^6 k+1/2k
b) Σ^6 k+2/2k
c) Σ^6 k+2/2^k
d) Σ^7 (1+(k+1)/(k+2))

a,b,and c the symbol of sigma sign has k=2 on the top but the last one has k=4. These options or answers are different. I have to choose one of them

Answer 3

Maria/Alice -- why did you change names?

Answer 4

first and middle name. my friends call me Maria and my teacher Alice. Sorry

Answer 5

I agree with bob's expression.

If there are only 5 terms, and they are:
1+ 5/6+ 6/8+ 7/10 + 8/12
= 4/4 + 5/6 + 6/8 + 7/10 + 8/12
= Σ (n+3)/(2n+2) from n = 1 to 5

In the standard notation of sigma , the index usually starts at 1.
The choices you give are not standard answers.