Question # 1

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Ellipse

Parabola

Hyperbola

Circle

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28

29

A null vector is defined as a vector whose magnitude is:

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1

2

0

None of these

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0

1

2

4

The equi. of latus-rectum of the parabola y² = -4ax is:

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x = a

x = -a

y = a

y = -a

The conic is a parabola, if:

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e = 1

e > 1

0 < e < 1

e = 0

The number e denotes the _______ of the conic:

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Directrix

Vertex

Focus

Eccentricity

The graph of the parabola y² = -4ax is symmetric about:

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x-axis

major axis

y-axis

minor axis

If the directed distances AP and PB have same signs, then their ratio is positive and P is said to divide AB:

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Internally

May be divide

Externally

None of these

If 2 and 2 are x and y-components of a vector, then its angle with x-axis is:

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30°

45°

60°

90°

The graph of the parabola y²= -4ax is symmetric about:

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x-axis

y = x

y-axis

None of these

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