3,(−1,2)
2√2,(2,−1)
2√2,(2,1)
9,(2,1)
Correct answer is C
Equation of a circle with radius r and centre (a, b).
= (x−a)2+(y−b)2=r2
Expanding, we have
x2−2ax+a2+y2−2by+b2=r2
Comparing, with x2+y2−4x−2y−3=0
2a=4⟹a=2
2b=2⟹b=1
r2−a2−b2=3⟹r2=3+22+12=8
r=2√2
A force of 30 N acts at an angle of 60° on a body of mass 6 kg initially at rest on a smooth hor...
Age in years 10 - 14 15 - 19 20 - 24 25 - 29 30 - 34 Frequency 6 8 14 10 12 ...
Given that g ; x → 3x and f ; x → cos x. Find the value of go f(20o) ...
Express \frac{4π}{2} radians in degrees....
Find the radius of the circle 2x^2 - 4x + 2y^2 - 6y -2 = 0. ...
Three forces F_{1} = (8 N, 300°), F_{2} = (6 N, 090°) and F_{3} = (4 N, 180°) ac...
Given that a = \begin{pmatrix} 2 \\ 3 \end{pmatrix} and \(b = \begin{pmatrix} -1 \\ 4 \end{pmat...
Find the radius of the circle 2x^2 + 2y^2 - 4x + 5y + 1 = 0...