Question # 1

If A ⊆ B then A ∪ B is

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A

B

A'

A ∩B

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

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One-one function

Constant function

Onto function

Quadratic function

The number of subset of {0} is

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1

2

3

None

If B-A≠φ , then n(B-A) is equal to

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n(a)+n(c)

n(c)-n(a)

n(a)-n(c)

None of these

If p and q are two statements then their conjunction is denoted by

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For any set X, X∪X is

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X

X'

Φ

Universal Set

Which symbolic notation represent unary operation ?

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-

∨

∧

⇔

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An empty set

Universal set

A singleton set

None of these

(A∩Bc)c= -------------------------

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Ac∪Bc

Ac∪B

Ac∩B

None of these

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The multiplicative inverse of -1 in the set {1-, 1} is

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1

-1

+-1

0

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An empty set

Universal set

A singleton set

None of these

Which of the following is the subset of all sets?

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

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One-one function

Constant function

Onto function

Quadratic function

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Z is the set of integers, (z, *) is a group with a * b = a + b + 1, a, b∈G. then inverse of a is

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-a

a + 1

-2 -a

None of these

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

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Addition

Multiplication

Subtraction

Division

The set of complex numbers forms a group under the binary operation of

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Addition

none of these

Division

Subtraction

The number of proper subset of A ={a.b.c.d} is

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3

6

8

15

A - B = ______

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ECAT Mathematics Chapter 23 MCQs With Answers

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