Question

Explain how to express series using sigma notation :
4+8+12+16+20+...

Answer 1

\[\sum_{k=1}^{\infty} \]
what I have so far ^.

Answer 2

\[\sum_{n=1}^{n=\infty} 4n\]

Answer 3

how did you figure that out ?

Answer 4

see all the terma are multiples of 4
4*1=4
4*2=8
and so on.........
summation means to sum up........so.
for n=1,we get 4 .......then for n=2,we get 8.......for n=3,we get 12.....and so on
so ,final result 4+8+12+16+20+...

Answer 5

its terms........

Answer 6

didnt get it???

Answer 7

got it. thanks