Exercise 4.1

( ) 35 5i i −   2. i i9 19+ 3. i −39

3(7 + i7) + i (7 + i7) 5. (1 - i) - ( -1 + i6) 6. 1 2 5 45 5 2i i   + − +       7. 1 7 1 4 43 3 3 3i i i      + + + − − +             8. (1 - i )4 9. 1 33 i  +   10. 12 3 i − −   Find the multiplicative inverse of each of the complex numbers given in the Exercises 11 to 13. 11. 4 - 3i 12. 5 3 i+ 13. - i 14. Express the following expression in the form of a + ib : ( ) ( ) ( ) ( ) / 3 5 3 5 / 3 2 3 2 / i i / i i + − + − −