It's true for all z.
Okay,
1) Z is the complex number
a) State the value of , hence show that for all
b) use the formula for the sum of a geometric series to show that
c) Let show that . Also show that and hence find an expression for in surd form.
i have done all parts except part c, am stuck on that bit
my solutons for a and b
recognising z as an 5th root of unity?
b)
Hello!
Would try to help you!
I'm not sure, but what i got is
Rectangualr form a^2*z^2+1/z^2+2
Polar form a^2*z^2+1/z^2+2
check it here Online Complex Numbers Calculator
I used Complex Numbers Calculator
Good luck