You can have a go yourself
say
Find
and
are they the same?
Is real?
not sure how this one is different to the previous option?!
evaluate is it real?
Is real?
Hi
Need help on the following:
1)if z is any cube root of unity then 1+z+z^2 must be.
A - 0
B - 1
C - 3
D - 0 or 3
E - 1 or 3
2) For any complex numbers z with conjugate , which of the following is not necessarily true?
A -
B - is real
C - is real
D - is real
E - is real
P.S
You can have a go yourself
say
Find
and
are they the same?
Is real?
not sure how this one is different to the previous option?!
evaluate is it real?
Is real?