Question # 1

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

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1

i

-1

-i

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The multiplicative inverse ofx^(-1) is

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x

a-2

0

1

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

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Commutative law of multiplication

Multiplicative identity

Associative law of multiplication

Multiplicative inverse

∀x,y,z ∈ R and z 0,then

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x > y ⇒ xz > yz

x<y ⇒ xz < yz

x < y ⇒ xz > yz

None of these

A subset of set of complex number whose elements are of the form (a,0) is called

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Real number

Complex number

Rational number

Irrational number

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-8

8

8i

32

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Set of whole number

Rational Numbers

Complex numbers

Whole numbers

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QUQ'

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The additive identity of real number is

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1

2

1/2

0

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

Multiplicative inverse of "1" is

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0

±1

1

{0,1}

i =

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√1

√2

√-2

√-1

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

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(a, 0)

(0, b)

(a, b)

(-a, -b)

i² =

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1

2

-1

0

The set { 1 , -1} is closed w.r.t.

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Addition

Multiplications

Subtraction

None of these

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Reflexive property

Symmetric property

Transitive property

Additive property

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If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

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- x

Infinite set

Φ

{-4,4}

Every whole number is

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A real number

An irrational number

A prime number

A negative integer

a >b, b >c ⇒a >c is a

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Multiplicative property

Additive property

Trichotomy property

Transitive property of inequality

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A non-terminating non_recurring decimal represents an

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Irrational no

Both a & c

Rational no

None of these

24 can be written as a product of

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Odd factors

Even factors

Whole factors

Prime factors

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(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

a >b ⇒a +c >b +c is known as

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

√x = ______ if is a prime number

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Rational no

Natural no

Irrational no

Complex no

I is not

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Real number

Natural number

Prime Number

Whole Number

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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers

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