Question # 1

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An empty set

Universal set

A singleton set

None of these

If z1 = 2 + 6i and z2 = 3 + 7i then which expression defines the product of z1 and z2

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36 +(-32)i

-36+32i

6+(-11)i

0, +(-12)i

The statement that a group can have more than one identity elements is

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True

False

Fallacious

Some times true

The set of the first elements of the ordered pairs forming a relation is called its

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Function on B

Range

Domain

A into B

A conjunction of two statement p and q is true only if

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p is true

q is true

Both p and q are true

both p and q are false

Which conjunction is not true ?

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Addition

Multiplication

Division

Both addition and multiplication

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none of these

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A = C

A = B

B = C

None of these

If A and B are two sets then any subset R of A x B is called

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relation on A

relation on B

relation from A to B

relation from B to A

Let A,B, and C be any sets such that A∪B = A∪C and A∩B = A∩C then

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A≠ C

B = C

A = B

A≠ B

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n(A)

n(B)

0

1

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a constant function

linear function

quadratic funtion

none of these

The set (Z,+) forms a group

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Forms a group w.r.t addition

Non commutative group w.r.t multiplication

Forms a group w.r.t multiplication

Doesn't form a group

If A = {x/x is a positive integer and 4≤x<23}, then A=

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{1,2,3,4,5,6,7}

{4,5,6...........22}

{1,2,3,.........23}

{1,2,3,4,5}

For any two sets A and, A ⊆ B if

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x ∈ A ⇒ x ∈ B

x ∉ A ⇒ x ∉ B

x ∈ A ⇒ x ∉ B

None of these

A function whose range is just one element is called

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One-one function

Constant function

Onto function

Identity function

If we have a statement "if p then q" then q is called

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Conclusion

Implication

Unknown

Hypothesis

The number of subsets of a set having three elements is

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4

6

8

none of these

The function f{(x, y) | y = ax²+ bx + c} is

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One-one function

Constant function

Onto function

Quadratic function

The function {f(x,y)|y = ax2 +bx +c} is

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One-one function

Constant function

Onto function

Quadratic function

The graph of a quadratic function is

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Circle

Straight line

Parabola

Triangle

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Biconditional

Implication

Antecedent

Hypothesis

The set {-1, 1} is closed under the binary operation of

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Addition

Multiplication

Subtraction

Division

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square root function

identity function

linear function

quadratic function

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The set of complex numbers forms

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Commutative group w.r.t addition

Commutative group w.r.t multiplication

Commutative group w.r.t division

Non commutative group w.r.t addition

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Decimal part of irrational number is

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Terminating

Repeating only

Neither repeating nor terminating

Repeating and terminating

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(A ∩ B)c =

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A∩ B

(A ∪ B)c

Ac∪Bc

Φ

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ECAT Pre General Science Mathematics Chapter 2 Set, Functions and Groups Online Test MCQs With Answers

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