Teaching DSSSB TGT Mock Test 2025 Mathematics Complex Numbers Properties of Complex Numbers

If z1 = 1 - 2i, z2 = 1 + i and z3 = 3 + 4i, then \(\left| {\left( {\frac{1}{{z_1}} + \frac{2}{{z_2}}}\right)\frac{{z_3}}{{z_2}}} \right| \)

1
\(\frac{\sqrt7}{2}\)
2
\(\frac{\sqrt5}{2}\)
3
\(\sqrt \frac{45}{2} \)
4
\(\frac{\sqrt{15}}{2}\)
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