ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 4 (Functions and Groups)

• 
  A
• 
  B
• 
  C
• 
  D

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

• Domain A
• Range B
• Ordered paris C
• Relation D

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

• domain A
• range B
• ordered paris C
• relation D

arb mean

• a is related to b A
• b is related to a B
• a is reciprocal of b C
• a is not related to b D

The function denoted by 1/f called the

• Reciprocal function A
• Inverse function B
• Constant function C
• Reverse function D

• 
  A
• 
  B
• 
  C
• 
  D

If the number of elements in set A is n, and in set B is m, then the number of elements in AxB will

• n^m A
• mⁿ B
• m x n C
• m + n D

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

• Domain A
• range B
• function C
• relation D

A relation A into B in which Domain is not equal to A, is called

• into function A
• onto function B
• None of these C
• surjective D

Which of the following is surjective

• 
  A
• 
  B
• 
  C
• 
  D

If range of a function f is B, then the function is

• surjective A
• injuctive B
• bijective C
• into D

Addition is not operation on

• Natural numbers A
• Even numbers B
• odd numbers C
• set of integers D

A semi-group having an identity is called a

• groupoid A
• non-commutative B
• abelian C
• monoid D

Such a function which is (1 -1) is called

• surjective A
• injuctive B
• bijective C
• into D

Which of the following notation defines AxB

• 
  A
• 
  B
• 
  C
• 
  D

ax+by+c = 0, represent a

• circle A
• parabola B
• straight line C
• quadratic circle D

The set of second elements of the ordered pairs forming a relation called a

• Domain A
• Range B
• Function C
• Relation D

The graph of a constant line is

• vertical line A
• parabola B
• circle C
• horizontal line D

Extraction of square root of a given number is a

• unary operation A
• binary operation B
• group C
• inverse function D

The extraction of a cube root of a given number is a

• Binary operation A
• Unary operation B
• group C
• multiplicative inverse D

The group of a constant line is

• Vertical line A
• Parabola B
• Circle C
• Horizontal line D

The net of cartesian product AxB consists of

• domain A
• range B
• binary relation C
• ordered pair D

N is closed with respect to ordinary

• addition A
• multiplication B
• addition and multiplication C
• division D

If A is non-empty set, any subset of A x A is called a relation in

• A A
• B B
• ∅ C
• r D

ax+by+c = 0 , represents a

• Circle A
• Parabola B
• Straight line C
• Quadratic circle D

The identity function is

• surjective A
• injuctive B
• bijective C
• into D

The set {E,0}, is closed under (ordinary)

• multiplication A
• addition B
• subtraction C
• division D

Let A and B be two non-empty sets, then any subset of the cartesian product AxB is called a

• function A
• domain B
• range C
• binary relation D

If no two elements of ordered pair of a functions from A into B are equal, then it is called.

• Surjective A
• Injuctive B
• Bijective C
• Onto D

• bijective function A
• into function B
• onto function C
• surjective D