Question # 1

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real numbers

complexnumbers

primenumbers

oddnumbers

The set of all rational numbers between 2, 3 is:

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an empty set

an infinite set

a finite set

a power set

Multiplicative inverse of -i is:

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i

-i

1

-1

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a + c = b + d

a + b = c + d

a - b = c - d

None of these

Which of the following is correct:

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2 + 7i > 10 + i

1 + i > 1 - i

4 + 3i > 1 + 3i

none of these

i² + 1 =

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-1

0

i

1

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Additive property

Multiplicativeproperty

Reflexiveproperty

Transitive property

Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

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0

i

-i

1

The additive inverse of a real number is a:

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0

-a

a

Conjugate of a + i b is:

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-a + ib

a + ib

-a - ib

a - ib

Conjugate of complex number (-a, -b) is:

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(-a, b)

(-a, -b)

(a, -b)

none of these

π is defined as:

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ration of diameter of a circle to its circumference

ration of the circumference of a circle to its diameter

ration of area of a circle to its circumference

ration of the circumference of a circle to its area

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

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

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i

0

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

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integer

rationalnumber

irrationalnumber

naturalnumber

If z₁ = 4i and z₂ = 3 - 9i, then z₁ + z₂ =

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3 - 5i

3i - 5

7 - 9i

3 + 5i

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Reflexive property

Symmetricproperty

Transitiveproperty

Trichotomyproperty

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

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