Question
Question: If the normal at three points (ap2, 2ap), (aq2, 2aq) and (ar2, 2ar) are concurrent then the common r...
If the normal at three points (ap2, 2ap), (aq2, 2aq) and (ar2, 2ar) are concurrent then the common root of equations px2 + qx + r = 0 and a(b – c) x2 + b (c – a) x + c(a – b) = 0 is
A
p
B
q
C
r
D
1
Answer
1
Explanation
Solution
Given points are co-normal points
̃ p + q + r = 0
Common root is 1.