Questions
Let ax + by + c = 0 be a variable straight line, where a, b and c are first, third and seventh terms of an increasing
A.P. Then, the variable straight line always passes through a fixed point which lies on
detailed solution
Correct option is B
Let d be the common difference of A.P., thenb = a + 2d and c = a + 6d. Clearly, (b – a) × 3 = c – a⇒ 2a – 3b + c = 0Thus, the straight line ax + by + c = 0 passes throughthe point (2, –3) which also satisfies x2 + y2 = 13.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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