Q. If the straight line $ax + by + c = 0$ always passes through $(1,\ - 2)$ then $a,b,c$ are in
A) AP
B) HP
C) GP
D) None of these
Explanation
(a)
$\because\$Line $ax + by + c = 0$ passes through $(1,\ - 2)$
$\therefore\ a - 2b + c = 0$
$\Rightarrow \ 2b = a + c$
$\Rightarrow \ a,b,c\$are in AP.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.