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if `z_1` and `z_2` are two complex numbers such that `absz_1lt1ltabsz_2` then prove that `abs(1-z_1barz_2)/abs(z_1-z_2)lt1`

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PATHFINDER-COMPLEX NUMBER-QUESTION BANK
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  11. Let z1,z2 be two fixed complex numbers in the Argand plane and z be an...

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  13. Suppose that z1, z2, z3 are three vertices of an equilateral triangle ...

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