NDA2017MathematicsFunctionsActual
The function f: X Y defined by f( x )= x , where x X , is one-one and onto if X and Y are respectively equal to
Options
- A[0, ] and [-1,1]
- B[- 2 , 2 ] and [-1,1]
- C[0, ] and (-1,1)
- D[0, ] and [0,1]
Correct answer
A. [0, ] and [-1,1]
Step-by-step solution
Observe the cosx graph in the figure. It is clear that, function is one - one and onto when x and y are [0, ] and [-1,1]