Question # 1

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15

15 i

-15 i

-15

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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

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A rational number

A natural number

An irrational number

An integer

Which element is the additive inverse of (a,b) in Complex numbers

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(a,0)

(0,b)

(a,b)

(-a,-b)

The product of complex numbers (a,b) and (c,d) is

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(ac, bd)

(ac-bd, ad+bc)

(ab,cd)

(ac+bd,ad-bc)

For any real numbers x,y,xy=o ⇒

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x ≠ 0 ∧ y ≠ 0

x = 0 ∨ y = 0

x = 0

y = 0

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N

r

2r

π

i³ =

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-1

i

-i

1

The√ is used for the

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Positive square root

Negative square root

+ve and -ve square root

Whole number

If 0 = R, thenthe additive inverse of a is

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1/9

^1/-9

a

-a

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The set of natural no. is closed under

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multiplication

subtraction

difference

division

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Closure law of addition

Closure law of multiplication

Commutative law of addition

Commutative law of multiplication

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Zero is

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An irrational number

A rational number

A negative integer

A positive number

if Z1 = 1+i, Z2= 2+3i, then |Z2 -Z1| =

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√3 i

√7

-2-i

√5

Associative law of multiplication

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ab = ba

a(bc) = (ab) c

a(b+c) = ab + ac

(a + b)c = ac + bc

Additive inverse of - a - b is

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a

-a + b

a - b

a + b

In R, the multiplicative identity is

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0

1

-1

None

(a+bi) - (c+di)=

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(a+b) = (c+d)

(a+c) + i(b+d)

(a - c) + (c- d)i

(a - c)+ (b - d)i

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Reflexive property

Symmetric property

Transitive property

Additive property

i^-(4n+2)= -------------------------------

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1

i

-1

-i

Name the property used in 4.1 + (-4.1) = 0

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Additive inverse

Multiplication inverse

Additive identity

Multiplication identity

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6 is

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A prime integer

An irrational number

A rational number

An odd integer

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

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Associative property

Identity property

Commutative property

Closure property w.r.t multiplication

The square root of every incomplete square is an

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Rational numbers

Even numbers

odd numbers

Irrational numbers

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

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