Question # 1

The conjugate of 5 + 4i is

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-5 + 4i

-5 - 4i

5 - 4i

5 + 4i

∀ a∈ R⇒ a + o = a = o + a, then O is called:

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Multiplicative identity

Additive identity

Additive inverse

Multiplicative inverse

There exists a unique real number 1, is called ________ in multiplication:

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Multiplicative inverse

Additive inverse

Multiplicative identity

Additive identity

If a, b∈R then only one oaf a = b or a<b or a>b holds is called:

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Trichotomy Property

Transitive Property

Additive Property

Multiplicative Property

Conjugate of 4i - 3 is:

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4i + 3

-4i - 3

-4i + 3

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3

1/3

35

None of these

The conjugate of 5+ 4i is:

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-5 +4i

-5 - 4i

5 - 4i

5 + 4i

Which of the following is closure property w.r.to multiplications:

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a + b∈ R∀ a, b∈ R

a. b∈ R∀ a, b∈ R

a + b = b + a∀a,b∈ R

a.b = b.a∀a,b∈ R

Which of the following is associative property w.r.to addition:

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a + b = b + a

a (bc) = (ab) c

a + (b + c) = (a + b) + c

None of these

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a = Im

a = Re(z)

a = Natural number

None of these

If Z₁ = a + bi and Z₂ = c + di then Z₁.Z₂ =

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ac + bdi

ac - bd

ac - bd + adi + bci

multiplication is not possible

The real numbers are represented geometrically by points on _________,

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Plane

Line

Space

None

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Transtitive

Multiplicative inverse

Multiplicative identity

None

Real part of 2ab ( i + i²) is:

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2ab

-2ab

2abi

-2abi

In Z = a + bi, a is called ______ part of Z.

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Real

Imaginary

Whole

None

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