Maths-
General
Easy

Question

Assertion: The function defined by f left parenthesis x right parenthesis equals x to the power of 3 end exponent plus a x to the power of 2 end exponent plus b x plus c is invertible if and only if a to the power of 2 end exponent less or equal than 3 b.
Reason: A function is invertible if and only if it is one-to-one and onto function.

  1. If both (A) and (R) are true, and (R) is the correct explanation of (A) .    
  2. If both (A) and (R) are true but (R) is not the correct explanation of (A) .    
  3. If (A) is true but (R) is false.    
  4. If (A) is false but (R) is true.    

The correct answer is: If both (A) and (R) are true, and (R) is the correct explanation of (A) .


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