Question 1
The centre and radius of x² + y² − 4x + 6y − 3 = 0 are: (NDA PYQ)
A(4, −6) and 3
B(2, −3) and 4
C(−2, 3) and 4
D(2, 3) and 4
Question 2
The standard equation of a parabola with vertex at origin, axis along x-axis, focus at (a,0) is: (NDA PYQ)
Ax² = 4ay
By² = 4ax
Cx² = −4ay
Dy² = −4ax
Question 3
The eccentricity of a circle is: (NDA PYQ)
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