Cho số thực k ∈ R, hãy viết số phức sau dưới dạng nhị thức z=(1+ki)/{2k+(k^2-1)i}

.

1 is c

2 is a

3 is a

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

answer:   c ?

step-by-step explanation:

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.