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Consider the function f(x) = , then which one of the following is correct?
  • a)
    f (x) is every where differentiable except x = 0
  • b)
     is empty set.
  • c)
    set of point which f(x) ≥ -1 is countable
  • d)
    None of the above
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the function f(x) =, then which one of the following is corre...
 Given that

 
It is clear that f(x) is not continuous at the points x = nπ, n ∈ z, therefore it is not differentiable at the points.
Which f(x) > 1/2, and f (x) ≥ - 1, also there points are not countable. 
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Most Upvoted Answer
Consider the function f(x) =, then which one of the following is corre...
 Given that

 
It is clear that f(x) is not continuous at the points x = nπ, n ∈ z, therefore it is not differentiable at the points.
Which f(x) > 1/2, and f (x) ≥ - 1, also there points are not countable. 
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Consider the function f(x) =, then which one of the following is correct?a)f (x) is every where differentiable except x = 0b)is empty set.c)set of point which f(x) ≥ -1 is countabled)None of the aboveCorrect answer is option 'D'. Can you explain this answer?
Question Description
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