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JEE MATHEMATICS MCQ: COMPLEX NUMBERS

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Application +4 | -1
If z1=6+3iz_1=6+3 i and z2=2−iz_2=2-i, then z1z2\frac{z_1}{z_2} is equal to 1a(9+12i)\frac{1}{a}(9+12 {i}). The value of 'aa' is
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Correct option: A
5
Option A (5) is correct because simplifying the fraction z1/z2 results in (1/5)(9 + 12i), so the value of 'a' is 5.

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