Question # 1

The multiplicative inverse of -3i is

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3i

-3i

-1/3i

1/3 i

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(7,9) +(3,-5) =

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(4,4)

(10,4)

(9,-5)

(7,3)

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Commutative law of multiplication

Closure law of multiplication

Associative law of multiplication

Multiplication identity

In R the right cancellation property w.r.t. addition is

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

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Addition

Both a & c

Multiplication

None of these

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In (x + iy) x is the known as

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Imaginary part of complex number

Real part of complex number

Complex number

None of above

The set of natural no. is closed under

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multiplication

subtraction

difference

division

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real number

complex number

rational number

irrational number

∀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

Any recurring decimal represents a

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Irrational no

Integer

Rational no

None of these

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1

-1

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

14 is not a

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Prime number

Whole number

Even number

Real number

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

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(a +bi) -c (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

The square root of 2i - 20i is

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+-(5 - 2i)

+-(5 + 2i)

(5 - 2i)

None of these

√23 is

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A rational number

A irrational number

An even integer

A factor of 36

The value of i⁴ⁿ⁺¹

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1

-1

i

i²

Rational number is a number which can be written as a terminating decimal fraction or a

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Non-terminating decimal fraction

Non-recurring

Recurring decimal fraction

a, b and c

Every whole number is

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A real number

An irrational number

A prime number

A negative integer

Every irrational number is

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A real number

A prime number

A natural number

An integer

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)

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Reflexive property

Symmetric property

Transitive property

Additive property

π is ______

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A complex number

A rational number

A natural number

An irrational number

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(a,0) x (c, 0) =

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(0,ac)

(ac, 0)

(0,0)

(a, c)

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