Question

Does anyone know what the letter i in sigma notation means?

Answer 1

Could someone please explain why there is an i?

Answer 2

\[\sum\limits_{k=1}^{10}-ki\]

i guess \(i\) is just the variable

Answer 3

but when i try to find a1, how would i do that

Answer 4

Here is the question: Write each arithmetic series as the sum of terms. Find each sum

Answer 5

\[\sum\limits_{k=1}^{10}-ki=-(1)i-(2)i-3(i)-\dots-(9)i-10(i)\]

Answer 6

oh, i understand, that was easy :D

Answer 7

thank you !