Page 158 - Engineering Mathematics Workbook_Final

Complex Variables

(c) set of confocal hyperbolas
(d) set of confocal ellipses

[GATE-2006-EC] (d)

155. A complex variable z = x + j(0.1) has
its real part x varying in the range
− to . Which one of the following
is the locus (shown in thick lines) of [GATE-2008 (IN)]
1
in the complex plane? 156. A point z has been plotted in the
z
complex plane, as shown in figure
below

(a)

1
lies in the curve
z

(b)

(a)

(c)

(b)

156