Question # 1

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

Division of a natural number by another natural number gives:

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always a natural number

always an integer

always a rationalnumber

always an irrational number

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

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integer

rationalnumber

irrationalnumber

naturalnumber

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closureproperty

associativeproperty

commutativeproperty

trichotomyproperty

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a + c = b + d

a + b = c + d

a - b = c - d

None of these

The real part of the complex number a + bi is:

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b

-b

a

-a

The ordered pairs (2, 5) and (5, 2) are:

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not equal

equal

disjoint

empty

If z = x + i y = r (cos Θ + i sin Θ), then arg z is:

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tan Θ

cos²Θ + sin²Θ

r

Θ

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x = 0, y = 0

Every real number is also a/an:

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integer

rational number

irrationalnumber

complexnumber

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

Multiplicative inverse of -i is:

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i

-i

1

-1

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

The multiplicative invers of a non-zero real number a is:

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0

-a

a

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integer

rational number

irrational number

natural number

i² + 1 =

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-1

0

i

1

The imaginary part of the complex number a + bi is:

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a

b

bi

none of these

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Additive property

Multiplicativeproperty

Reflexiveproperty

Transitive property

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