" 21.If "z=(1)/((2+3i)^(2))," then "|z|=

If z=(1)/((2+3i)^(2)), then |z| is a.(1)/(13) b.(1)/(5) c.(1)/(12)d .non of these

If z = (1)/((2-3i)^(2)) then |z| is equal to

If z=1/((2+3i)^2), then |z| is (a) . 1/13 (b) . 1/5 (c) . 1/12 (d) . none of these

If z_(1)=2+3i and z_(2)=3+2i , then |z_(1)+z_(2)| is equal to

Q.Let z_(1),z_(2),z_(3) be three vertices of an equilateral triangle circumscribing the circle |z|=(1)/(2), if z_(1)=(1)/(2)+sqrt(3)(i)/(2) and z_(1),z_(2),z_(3) are in anticlockwise sense then z_(2) is

if z_(1)=3+i and z_(2) = 2-i, " then" |(z_(1) +z_(2)-1)/(z_(1) -z_(2)+i)| is

if z_(1)=3+i and z_(2) = 2-i, " then" |(z_(1) +z_(2)-1)/(z_(1) -z_(2)+i)| is

If z_(1) = 2+ 3i and z_(2) = 5-3i " then " z_(1)z_(2) is

If z_(1) = 2+ 3i and z_(2) = 5-3i " then " z_(1)z_(2) is