A P Prabhakaran Solutions for Chapter: Complex Numbers and Quadratic Equations, Exercise 3: OBJECTIVE TYPE QUESTIONS

$i+i^3+i^5+\dots$to $(2n+1)$ terms is

Some students planned for a picnic. The total cost for the food was estimated to be $₹2400$. But $5$ of them failed to turn up at the last moment and the cost of each of the remaining students increased by $₹16$. Then number of students who went for the picnic is

The multiplicative inverse of the complex number $(a,b)$ is 

The complex number $z=x+iy$ satisfies the equation $\left|\frac{z-5i}{z+5i}\right|=1$. Then

The complex conjugate of $\sin \frac{\pi }{2}+i\sin \pi$ is 

The value of $5i^5+4i^4-3i^3+2i^2-i$ is 

If $3x+i(4x-6y)=2-i$, then the values of $x$ and $y$ respectively are

If $\left|\right(3+\sqrt{31}i\left)\right(x+iy\left)\right(4+3i\left)\right(2+\sqrt{6}i\left)\right|=50$ then $x^2+y^2$ is equal to