Equation of a tangent to the circle with centre $(2,-1)$ is $3{x}+y=0$. If the square of the length of the tangent to the circle from the point $(23,17)$ is $k$ then find $k-1520$.

JEE MATHEMATICS MCQ: CIRCLES

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Application +4 | -1

Equation of a tangent to the circle with centre

(2,-1)

3{x}+y=0

. If the square of the length of the tangent to the circle from the point

(23,17)

k

then find

k-1520

View answer and explanation

Correct option: A

Option C (7) is correct because after calculating the radius and using the formula for the length of the tangent, k is found to be 1525, so k-1520 = 5.

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