Question

(1+i^3)(1+i^5)(1+i^7)(1+i^9)

Answer 1

Answer:

Multiply the complex forms as normal multiplication.

Answer 2

Answer:

(1-i) (1+i) (1-i) (1+i)

(1-i^2) (1-i^2)

(1+1) (1+1)

2*2

4