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lf z(!=-1) is a complex number such that...

lf `z(!=-1)` is a complex number such that `[z-1]/[z+1]` is purely imaginary, then `|z|` is equal to

A

2

B

1

C

3

D

None of these

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • If z is a complex number such that (z-1)/(z+1) is purely imaginary, then |z| is equal to

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    B
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    D
    none of these

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

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    ` | z| = 1 `
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