If $a$ is a complex number and $b$ is a real number, then the equation $\bar{a}+a+b=0$ represents $a$

If $a$ is a complex number and $b$ is a real number, then the equation $\bar{a}+a+b=0$ represents $a$
  1. straight line
  2. parabola
  3. circle
  4. hyperbola

Solution

Let $a=x+i y$, then $\bar{a}=x-i y$ Thus, $\bar{a}+a+b=0$ $\begin{aligned} \Rightarrow & x-i y+x+i y+b & =0 \\ \Rightarrow & 2 x+b & =0 \\ \Rightarrow & x+\frac{b}{2} & =0\end{aligned}$ Which represent a straight line.

Asked in: AP EAMCET 2001

Practice more Complex Number questions on Aicharya