NDA2015MathematicsContinuity and DifferentiabilityActual
Consider the following statements: 1. f(x)=[x] , where [.] is the greatest integer function, is discontinuous at x=n , where n Z . 2. f(x)= x is discontinuous at x=n , where n Z . which of the above statements is/are correct?
Options
- A1 only
- B2 only
- CBoth 1 and 2
- DNeither 1 or 2
Correct answer
C. Both 1 and 2
Step-by-step solution
From statement-1 From the definition of greatest integer function f(x)=[x] is discontinuous at x=n for any value of n Z Statement 1 is correct From statement-2 f ( x )= x for x= = =- for x =2 f (2 )= 2 =- Hence the function f(x)= x is discontinuous at x = n where n Z . Option (C) is correct.