Solve this;
Q.51. If be two complex numbers such that is a purely imaginary number, then is equal to:
(A) 2
(B) 5
(C) 3
(D) 1
Kindly refer the similar link for your query.
https://www.meritnation.com/ask-answer/question/if-5z1-7z2-is-purely-imaginary-then-2z1-3z2-2z1/complex-numbers-and-quadratic-equations/10945011
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https://www.meritnation.com/ask-answer/question/if-5z1-7z2-is-purely-imaginary-then-2z1-3z2-2z1/complex-numbers-and-quadratic-equations/10945011
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