Question
Question: If (mi, 1/mi), i = 1, 2, 3, 4 are four distinct points on a circle then m<sub>1</sub>. m<sub>2</sub>...
If (mi, 1/mi), i = 1, 2, 3, 4 are four distinct points on a circle then m1. m2. m3. m4 =
A
0
B
1
C
–1
D
–2
Answer
1
Explanation
Solution
Let circle be x2 + y2 + 2gx + 2fy + c = 0
Putting (mi, 1/mi)
mi2 + mi21+ 2gmi + + c = 0
Ю mi4 + 2gmi3 + cmi2 + 2f mi + 1 = 0
Ю m1, m2, m3, m4
Product of roots = 1