Intersection of Line and Circle given Midpoint Coordinate
Suppose a line intersects the circle at two distinct points and . If the -coordinate of the midpoint of segment equals , then which of the following options is correct?
Options
A
B
Correct
C
D
Topics & Concepts
Step-by-Step Solution
To find the correct range for , we substitute the equation of the line into the circle to form a quadratic equation in . Using the relation for the sum of the roots, we set the -coordinate of the midpoint equal to , which yields the quadratic equation . Solving this gives and , both of which ensure two distinct points of intersection as the discriminant is strictly positive. Consequently, lies in the interval , making option (B) the correct choice.