Question # 1

Real part in -3i is:

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3

O

-3

1

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

Solution of x²= -1 in real numbers:

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-1

+1

Solution does not exist

The real numbers are represented geometrically by points on _________,

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Plane

Line

Space

None

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

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Real

Imaginary

Whole

None

A non-terminating, non-recurring decimal represents:

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A natural number

A rational number

An Irrational number

Prime number

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

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Multiplicative inverse

Additive inverse

Multiplicative identity

Additive identity

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Transtitive

Multiplicative inverse

Multiplicative identity

None

Identify the property used in x > y Or x = y Or x < y:

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Symmetric

Reflexive

Irichotomy

Transitive

Conjugate of 4i - 3 is:

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4i + 3

-4i - 3

-4i + 3

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Additive identity

Additive inverse

Multiplicative identiry

Multiplicative inverse

Every real number is also a complex number with imaginary part as ______

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1

b

O

10

The value of i^{9 is:}

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1

-1

i

-i

The conjugate of 5+ 4i is:

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-5 +4i

-5 - 4i

5 - 4i

5 + 4i

Conjugate of real number is:

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Pure imaginary

Real

Complex

None

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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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