QUIZ 1.1A

1. The sum of 3 + i and 7 + 5i is

(a) 8 + 7i   ; (b) 10 + 6i  ; (c) 7 + 8i   .   

2. The product of 3 + i and 7 + 5i is

(a) 21 + 5i   ; (b) 15 + 7i  ; (c) 16 + 22i   .

3. The product of i and -i is

(a) i   ; (b) -1  ; (c) 1  .

4. The product of 1 + 2i and 1 - 2i is

(a) 0   ; (b) -3   ; (c) 5  .