JEE Main 12 Jan 2019 Shift 1 Solved Paper

Section: Mathematics

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Question : 53 of 90

Marks: +1, -0

If

z−α

z+α

(α ∊ R) is a purely imaginary numberand |z| = 2, then a value of α is :

[12 Jan 2019 Shift 1]

1
2
√2
1
2

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