Answer :
Given:
a, b, c are in A.P.
To find:
The coordinates of that point.
Explanation:
If a, b, c are in A.P., then
a + c = 2b
⇒ a – 2b + c = 0
Comparing the coefficient of ax + by + c = 0 and a – 2b + c = 0, we get x = 1 and y = -2
Hence, the coordinate of that point is (1, -2).
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