Question

Expand the series and evaluate:

Answer 1

\[\sum_{k=1}^{4}(2k-1)\]

Answer 2

a) 2 + 4 + 6 + 8 = 16

b) 1 + 3 + 5 + 7 = 16

c) 1 + 3 + 5 + 7 = 21

d) 2 + 4 + 6 + 8 = 20

Answer 3

2k-1
plug in k= 1 to get 1st term
2(1) -1 = .... ?

plug in k= 2 to get 2nd term
2(2) -1 = .... ?

plug in k= 3 to get 3rd term
2(3) -1 = .... ?

lastly
plug in k= 4 to get 4th term
2(4) -1 = .... ?

Answer 4

b) 1 + 3 + 5 + 7 = 16

thanks man !(:

Answer 5

correct!
welcome ^_^