Edexcel Mathematics January 2023 · Paper 1 · Question 10 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

January 2023 · Paper 1 · Question 10 · 9 marks

10. A circle C has equation x2 + y2 + 6kx – 2ky + 7 = 0 where k is a constant. (a) Find in terms of k , (i) the coordinates of the centre of C (ii) the radius of C (3) The line with equation y = 2x – 1 intersects C at 2 distinct points. (b) Find the range of possible values of k . (6) 25

Lesson: Equations of a Straight Line