Q. The GM of roots of the equation $x^{2} - 18x + 9 = 0$ is
A) 3
B) 4
C) 2
D) 1
Explanation
(a)
Let $\alpha$ and $\beta$ be the roots of equation $x^{2} - 18x + 9 = 0.$
$\therefore GM\ of\ \alpha\ and\ \ \beta = \sqrt{\alpha\beta} = \sqrt{9} = 3$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.