Class XII

If the mappings f: A → →B and g: B → →C are both bijective, then the mapping A→ →C is
  1. -------------------------------------------------------------------------------- one – one but not onto
  2. one – one and onto
  3. onto but not one – one
  4. neither one – one nor onto
Which of the following is not an equivalence relation on I, the set of integers ; x, y
  1. -------------------------------------------------------------------------------- x R y x + y is an even integer
  2. x R y x ≤ y
  3. x R y x = y
  4. x R y x – y is an even integer
If A = { 1, 2, 3}, then the relation R = {(1, 2), (2, 3), (1, 3)} in A is
  1. -------------------------------------------------------------------------------- symmetric and transitive only
  2. symmetric only
  3. transitive only
  4. reflexive only
The range of the function f(x) = [sin x] is
  1. -------------------------------------------------------------------------------- { – 1, 0, 1}
  2. {–1, 1}
  3. (–1, 1)
  4. [1, 1].
A function f : X → Y f : X → Y is defined to be one – one (or injective), if
  1. the images of distinct elements of X under f are identical
  2. the images of distinct elements of X under f are not distinct
  3. the images of distinct elements of X under f are not defined
  4. the images of distinct elements of X under f are distinct
Time Elapsed

HR : MIN : SEC
Question Answered
0
Score out of 100
0

Get Started!

we provide the best
services to our students

AmazingCounters.com Views

 

LKG - 12th

Rs 1,999  Annual
Plan
TOP