Question

1
a
1. The equation of the director sphere of
x y z
the central conicoid
= 1 is
b
(A) x2 + y2 + z = a + b2+2
1
1
(B) x2 + y2 + z =
a b c
(C) ax2 + by2 + c 2 = a + b2 + c2
(D) x2 + y2 + z2 = 1
1
1​

Answer 1

option B

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