Question # 1

What is the conjugate of -7 -2i ?

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-7 + 2i

7 +2i

7 -2i

√53

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Commutative law of multiplication

Closure law of multiplication

Associative law of multiplication

Multiplication identity

The multiplicative inverse of 4 is

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-4

-1/4

1/4

1

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Principle of equality of fractions

Rule for product of fraction

Rule for quotient of fraction

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In (x +iy) y is called as

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Imaginary part

Complex number

Real part

None of above

∀a,b,c∈R and c>0,then

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a>b ⇒ ac < bc

a>b ⇒ ac > bc

a<b ⇒ ac > bc

None of these

The set {1,2,3,4......} is called

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Set of natural numbers

Set of whole numbers

Set of rational number

Set of irrational numbers

The value of i⁴ⁿ⁺¹

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1

-1

i

i²

The set {0,-1} hold closure property under

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Addition

Both a & c

Multiplication

None of these

a.a^-1= a^-1.a = 1 is a

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Commutative law of multiplication

Multiplication identity

Associative law of multiplication

Multiplication inverse

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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Trichotomy property

Transitive property

Symmetric property

Additive property

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a = a

a < a

a > a

a²= a

The set of rationals numbers between 0 and I is

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Finite

Null set

Infinite

None of these

0.25 is ______

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An irrational number

A natural number

A prime number

A rational number

∀a,b, c ε R,a +c = b + c = > a = b

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Reflexive property

Symmetric property

Cancellations property w.r.t. addition

Transitive property

The value of x, and y, when (x + iy)²= 5 + 4i

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X = 2, y = -1

X = -2, y=1

X = 2, y = -1

X = 2, y = 2

The multiplicative inverse of 0 is

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1

-1

0

Does not exist

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The multiplicative inverse of 1 - 2i is

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For each real number, there is a number which is its

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Negative

Possitive

Opposite

Similar

π is the ration of

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Area of a circle to its diameter

Area of a circle to its radius

Circumference of a circle to its diameter

Circumference of circle to its radius

In R, the additive inverse of a is

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0

1

-a

1/a

Every recurring decimal represents

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A natural number

A rational number

An irrational number

A whole number

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

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associative property w.r.t addition

commutative property

Closure property w.r.t addition

Additive identity

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-3 -2i

3 +2i

1 + 2i

1 - 2i

Associative law of multiplication

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ab - ba

a(bc) = (ab) c

a(b + c) = ab +ac

(a +b)c = ac + bc

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

Geometrically the modulus of a complex number represents its distance from the

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Point (1,0)

Point (0,1)

Point (1,1)

Point (0,0)

Every natural number is

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A prime number

An irrational number

An integer

An even number

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