- #1
UnD
- 21
- 0
just having a problem with these 3 questions.
z E C such that I am z=2 and z^2 is real find z
well from my knowledge, it's will be x+2i, z^2 is (x^2 -4) + 4xi, since I am z= 2
then 4xi= 2? doesn't it, Umm don't really know what to do next
2nd questions
z E C such that Re z= 2Im z, and z^2 -4i is real, find x.
Umm don't have a clue on this one
Also 1 more
z EC such that z/(z-i) is real, show that z is imaginary
Thanks very much if you can help
z E C such that I am z=2 and z^2 is real find z
well from my knowledge, it's will be x+2i, z^2 is (x^2 -4) + 4xi, since I am z= 2
then 4xi= 2? doesn't it, Umm don't really know what to do next
2nd questions
z E C such that Re z= 2Im z, and z^2 -4i is real, find x.
Umm don't have a clue on this one
Also 1 more
z EC such that z/(z-i) is real, show that z is imaginary
Thanks very much if you can help