Question

Can somebody help me?
Evaluate the series (n + 4)

Answer 1

\[\sum_{1}^{4}(n+4)\] confirm please

Answer 2

yeah
but its n-1 on the bottom

Answer 3

\[\sum_{1}^{4}n+\sum_{1}^{4}4\]

Answer 4

you know that
\[\sum_{1}^{n}n=\frac{n(n+1)}{2}\]
and you also know
\[\sum_{1}^{n}4= 4n\]

Answer 5

can you see the answer now

Answer 6

solve for n=4

Answer 7

I don't know how to do this though.

Answer 8

4x4 =16 and (4x5)/2=10, the total is 26

Answer 9

Thank you

Answer 10

u r more than welcome did you understand the process @OhDanielllleee

Answer 11

yes![: