Question

how to write this as a summation:

n=2 ==> (1+i)
n=4 ==> (1+i)^2
n=6 ==> (1+i)^2
till n=10

Answer 1

sorry at n=6 should be (1+i)^3

Answer 2

sorry at n=6 should be (1+i)^3

Answer 3

hint:
since n is an even number, then we can set n=2k, where k=1, 2, 3, 4, 5

Answer 4

\[\sum_{k=1}^{k=5}(1+i)^{2k}\]

Answer 5

hmm i don't think that correct

Answer 6

spitting out thoughts here

Answer 7

I think that your sum is:
\[\Large \sum\limits_{k = 1}^5 {{{\left( {1 + i} \right)}^k}} \]

Answer 8

oh yeah! thats silly of me to put the 2 next to the k

Answer 9

thanks so much!

Answer 10

thank you!