Question # 1

∀ a,b∈ R, a + b = b + a is _____________ Property of real numbers.

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Closure property w.r.to '+'

Closure property w.r.to 'x'

Commutative property '+'

Commutative property w.r.to 'x'

The real numbers are represented geometrically by points on _________,

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Plane

Line

Space

None

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Natural number

Whole number

integers

Rational numbers

Real part of 2ab(i + i²) is:

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2ab

-2ab

2abi

-2abi

If Z = Z₂ and Z₂ = Z₃ then Z₁ = Z₃ this property is known as ______ property:

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Reflexive

Symmetric

Transitive

Commutative

The conjugate of 5 + 4i is

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-5 + 4i

-5 - 4i

5 - 4i

5 + 4i

Symbol "For all" is used:

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A

Ɐ

gama

D

The conjugate of 6 + 5i.

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-6 + 5i

-6 - 5i

6 + 5i

6 - 5i

Every real number is:

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a Positive integer

a rational number

a negative integer

a complex number

a^m.aⁿ = a^m+nis ________ law of exponents.

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Sum of powers

Power of fraction

Power of power

Law of quotient

The conjugate of 5+ 4i is:

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-5 +4i

-5 - 4i

5 - 4i

5 + 4i

Set of Rational numbers in set builder notation:

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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

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

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Transtitive

Multiplicative inverse

Multiplicative identity

None

Set of Real numbers =

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Q

Q'

QႶQ'

QUQ'

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