Question
Question: If a, b, c are in A.P. then the line ax + by + c = 0 will always pass through...
If a, b, c are in A.P. then the line ax + by + c = 0 will always pass through
A
(–1, 2)
B
(1, 2)
C
(–1, 1)
D
(1, –2)
Answer
(1, –2)
Explanation
Solution
Q a, b, c are in A.P.
Ž 2b = a + c …(i)
ax + by + c = 0 …(ii)
So, compare (i) and (ii) Ž x = 1, y = –2
\ It passes through (1, –2)