Question

Help Sigma notation
see equation below

Answer 1

where?

Answer 2

\[\sum_{k=1}^{n}3(\frac{ k }{ n })\]
Express the following in closed form

Answer 3

Please help I don't know how to write this in closed form

Answer 4

ok wait for a minute

Answer 5

Thank you!

Answer 6

i think the question is wrong . below the summation sign k-1 may be wrong pls check once again

Answer 7

it is k=1 on the bottom

Answer 8

3(1/n)+3(2/n)+3(3/n)............+3(n-1/n)+3(n/n)

Answer 9

My homework online is saying this isn't the correct answer. But, I can't see another way to write it.

Answer 10

well then i give up u can see: http://en.wikipedia.org/wiki/Summation

Answer 11

\[\large \sum_{k=1}^{n} 3\left( \frac{ k }{ n } \right)=\frac{ 3 }{ n }\sum_{k=1}^{n}k =\frac{ 3 }{ n }\left( \frac{ n(n+1) }{ 2 } \right)=\frac{ 3 }{ 2 }\left( n+1 \right)\]

Answer 12

Thank you so much for your help!