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 .