Question # 1

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integer

rationalnumber

irrationalnumber

naturalnumber

Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

Modulus of 15 i + 20 is:

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20

15

25

none of the above

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

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a

b

bi

none of these

The additive inverse of a real number is a:

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0

-a

a

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

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closure property w.r.t multiplication

commutativeproperty w.r.t multiplication

associativeproperty w.r.t multiplication

trichotomy property

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additive property

multiplicative inverseproperty

transitive property

negative property

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

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

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b

-b

a

-a

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i

0

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

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3 - 5i

3i - 5

7 - 9i

3 + 5i

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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Additive property

Multiplicativeproperty

Reflexiveproperty

Transitive property

Conjugate of a + i b is:

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-a + ib

a + ib

-a - ib

a - ib

Conjugate of a- i b is:

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b + ia

-a + ib

-a - ib

a + ib

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real numbers

complexnumbers

primenumbers

oddnumbers

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

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