Question

If a, b, and c are in AP, then the straight line $ax+by+c=0$ will always pass through a fixed point whose coordinates are___

• A. (1,2)
• B. (1,-2)
• C. (-1,2)
• D. (2,1)

Answer 1

The correct option is B (1,-2)

If a, b, c, are in AP, then
a+c = 2b
or a-2b+c=0
Hence, ax+by+c=0 passes through (1,-2).