Question # 1

π, e are:

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integers

natural numbers

rationalnumbers

irrationalnumbers

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x = 0

y = 0

x = 0 and y = 0

x = 0 or y = 0

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

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3 - 5i

3i - 5

7 - 9i

3 + 5i

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

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cancellation property w.r.t multiplication

cancellationproperty w.r.t addition

multiplicativeproperty

additiveproperty

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

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not equal

equal

disjoint

empty

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

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

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Reflexive property

Symmetricproperty

Transitiveproperty

Trichotomyproperty

Multiplicative inverse of -i is:

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i

-i

1

-1

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

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0

-a

a

i² + 1 =

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-1

0

i

1

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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x = 0, y = 0

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

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(-a, b)

(-a, -b)

(a, -b)

none of these

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additive property

multiplicative inverseproperty

transitive property

negative property

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

Conjugate of a + i b is:

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-a + ib

a + ib

-a - ib

a - ib

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

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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