Questions
If are in A.P., then the straight line always passes through a fixed point, that point is
a
(-1, -2)
b
(-1, 2)
c
(1, -2)
d
1,-12
detailed solution
Correct option is C
Since 1a,1b,1c are in A.P.⇒1a+1c=2b -----------(1)The given line is xa+yb+1c=0⇒xa+yb+2b-1a=0 [Using (1)]⇒1ax-1+1ay+2=0⇒The given line passes through the point of intersection of x – 1 = 0 and y + 2 = 0 i.e., (1, –2) which is a fixed point.Talk to our academic expert!
Similar Questions
If the lines ax+by+c = 0, bx+cy+a = 0 and cx+ay+b=0 are concurrent then the point of concurrency is
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