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If(5z2)/(7z1) is purely imaginary, then ...

If`(5z_2)/(7z_1)` is purely imaginary, then `|(2z_1+3z_2)/(2z_1-3z_2)|=` (A) `5/7` (B) `7/9` (C) `25/49` (D) `1`

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RESONANCE DPP-JEE MAINS-All Questions
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  2. If 3^(49)(x+i y)=(3/2+(sqrt(3))/2i)^(100) and x=k y then k is: a.-...

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  3. If(5z2)/(7z1) is purely imaginary, then |(2z1+3z2)/(2z1-3z2)|= (A)...

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