Q. The length of the subtangent to the curve $x^{2} + xy + y^{2} = 7$ at $(1,\ - 3)$ is
A) 3
B) 5
C) 3/5
D) 15
Explanation
The correct answer is Option D: 15.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.