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Let f : R → R defined as f(x) = x be an identity function. Then
  • a)
    range f = R
  • b)
    range f = constant
  • c)
    range f = f
  • d)
    range f = {constant}
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Let f : R → R defined as f(x) = x be an identity function. Thena...
Identity function:
The function f : R → R defined by y = f (x) = x for each x ∈ R is called the
identity function. 
Domain of f = R
Range of f = R
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Let f : R → R defined as f(x) = x be an identity function. Thena...
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Let f : R → R defined as f(x) = x be an identity function. Thena)range f = Rb)range f = constantc)range f = fd)range f = {constant}Correct answer is option 'A'. Can you explain this answer?
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