Question # 1

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The set {1, 2, 3, 4, ....} is called

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Set of Natural numbers

Set of whole numbers

Set of rational number

Set of irrational numbers

Sec^-1x =

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Cos^-11/x

cosec^-11/x

Cos^-1(-x)

Tan^-1x

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2 and 9

3 and 2

2/3 and 9

3/2 and 6

If 4 ⁶P_r= ⁶P_r+1, then r is equal to

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4

3

2

1

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The harmonic mean between a and b is

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360°

180°

90°

None of these

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image

pre-image

constant

none of these

The vertex of the graph of the quadratic function f(x) =-x2+6x+1,is

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(-3,10)

(-3,-10)

(3,10)

(3,-10)

For two vector a and b, a+b = _______

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a b

b+a

b-a

None

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