Question # 1

The real number system contains.

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Positive Numbers

Negative numbers

Zero

(option a, b and c)

cos (α-β) = cosαcosβ+ sinαsinβis true for all

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α>β> 0

α>β

β>α

None of these

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0

-1

1

-2

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range of f

domain of f

both (a) and (b)

none of these

The centroid of a triangle divides each median in the ratio

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2 : 1

3 : 1

3 : 2

1 : 1

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Commutative law of addition

Associative law of addition

Additive identity

Additive inverse

x²+ x - 5 = 0 is

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A polynomial

An inequality

An identity

None

The condition for ax2 + bx c to be expressed as the product of linear polynomials is

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b4 - 4ac =0

b4- 4ac ≥0

b4- 4ac <0

b4= 4ac

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n if n is even

0 for any natural number n

1 if in odd

None of these

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Scalar matrix

Identity matrix

Null matrix

Symmetric matrix

The roots of the equations will be equal if b²- 4ac is

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Positive

Negative

1

Zero

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