Question # 1

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6

360

120

24

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The point of concurrency of the medians of the ΔABC is called its

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Orthocenter

Centriod

Circumcentre

Incentre

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A

B

A'

None of these

The equation x²+ y²= 0 represents

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A circle

A degenerate circle

An empty set

A st. line

a + x is ______

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A trinomial

A binomial

A monomial

None of these

The surface generated by lines, consists of two parts, called:

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vertex

apex

nappes

axis

Cofactor of an element aij denoted by Aij is

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(-2)i+j

Mij

(-1)i+j Mij

None of above

The equation of the sphere passing thro' (0, 0, 0), (a, 0, 0), (0, b, 0), (9, 0, c) is

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x²+ y²+ z²+ 2 ax +2 by + 2cz = 0

x²+ y²+ z²- 2ax - 2 by - 2cz = 0

x²+ y²+ z²- ax - by - cz = 0

x²+ y²+ z²+ ax + by + cz = 0

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