Question # 1

Set of Rational numbers in set builder notation:

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None of these

If Z₁ = Z₂ then Z₂ = Z₁ this property is known as _______ property:

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Reflexive

Symmetric

Transitive

Closure

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Z + W

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

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Multiplicative identity

Additive identity

Additive inverse

Multiplicative inverse

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Natural number

Whole number

integers

Rational numbers

Set of Real numbers =

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Q

Q'

QႶQ'

QUQ'

The conjugate of 6 + 5i.

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-6 + 5i

-6 - 5i

6 + 5i

6 - 5i

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x

x⁷

x ^1/7

x^7/2

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

If Z < 0 then x < y→

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xz < yz

xz > yz

xz = yz

None of these

∀ 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'

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-2/5

2/5

5/2

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

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Real

Imaginary

Whole

None

Solution of x²= -1 in real numbers:

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-1

+1

Solution does not exist

Conjugate of 4i - 3 is:

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4i + 3

-4i - 3

-4i + 3

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9th Class Mathematics Chapter 2 Real and Complex numbers English Medium KPK Boards Online Mcqs MCQs With Answers

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