Question

find the sum of the sequence

(look below)

Answer 1

\[\sum_{k=1}^{4} \left( k ^{3} +4\right)\]

Answer 2

write it out

Answer 3

put 1 for k, then 2, then 3 , then 4. Add all the answers together

Answer 4

wow it was that simple? looked more complex so the answer i got was 5, 12, 31, 68

Answer 5

how did you get 31?

Answer 6

and 68?

Answer 7

I just plug in 3 and 4 for k

Answer 8

and all I have to do is add them up right?

Answer 9

yeah, plug in 1,2,3,4. Add up the results. But, 31, 68 ain't part of the 'plug in results'

Answer 10

really? i got 31 from plugging in 3 and 68 by plugging in 4?

Answer 11

3^2 +4 = 9+4 = 13
or is it ^3 you wrote?

Answer 12

if it's k^3, then you're right..........couldn't see the power clearly....

Answer 13

yeah its ^3 so do I just add them all up for the sum

Answer 14

yeah. That's all.

Answer 15

thanks again!! You really are a big help!

Answer 16

yeah, you're very welcome.

Answer 17

you could also.post a testimonial for me.........(-_-)