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4-1.Complex numbers
easy
જો $(x + iy)(1 - 2i)$ ની અનુબદ્ધ $1 + i$ હોય , તો . . . .
A
$x = \frac{1}{5}$
B
$y = \frac{3}{5}$
C
$x + iy = \frac{{1 - i}}{{1 - 2i}}$
D
$x - iy = \frac{{1 - i}}{{1 + 2i}}$
Solution
(c) Given that $\overline {(x + iy)(1 – 2i)} = 1 + i$
==> $x – iy = \frac{{1 + i}}{{1 + 2i}} \Rightarrow x + iy = \frac{{1 – i}}{{1 – 2i}}$.
Standard 11
Mathematics