4-1.Complex numbers
easy

સંકર સંખ્યા $\frac{{1 + 2i}}{{1 - i}}$ એ . .. .ચરણમાં છે.

A

પ્રથમ

B

દ્રુતિય

C

તૃતીય

D

ચોથું

Solution

(b) $z = \frac{{1 + 2i}}{{1 – i}}$$ \Rightarrow \,z = \frac{{1 + 2i}}{{1 – i}} \times \frac{{1 + i}}{{1 + i}}$$ = \frac{{ – 1}}{2} + i\frac{3}{2}$
This complex number will lie in the $II$ quadrant.

Standard 11
Mathematics

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