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If the number (z-1)/(z+1) is purely imag...

If the number `(z-1)/(z+1)` is purely imaginary, then

A

|z| = 1

B

`|z| lt 1`

C

`|z| gt 1`

D

`|z| ge 2`

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The correct Answer is:
A
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MCGROW HILL PUBLICATION-COMPLEX NUMBERS -EXERCISE LEVEL 1
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  3. If the number (z-1)/(z+1) is purely imaginary, then

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  8. Let z(1), z(2), z(3) be three non-zero complex numbers such that z(1) ...

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  11. Let z(1), z(2), z(3) be three complex numbers such that |z(1)| = |z(2)...

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  19. The number of values of theta in (0, pi], such that (cos theta + i sin...

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