Maths-
General
Easy

Question

Let f be twice differentiable real valued function satisfying f to the power of ´ end exponent left parenthesis x right parenthesis not equal to 0 comma f left parenthesis x right parenthesis plus f to the power of ´ ´ end exponent left parenthesis x right parenthesis equals negative x g left parenthesis x right parenthesis f to the power of ´ end exponent left parenthesis x right parenthesis where g left parenthesis x right parenthesis greater than 0 for all x greater than 0 text  .If  end text f left parenthesis 0 right parenthesis equals negative 3 text end textand f to the power of ´ end exponent left parenthesis 0 right parenthesis equals 4 text end textthen
Statement -1:vertical line f left parenthesis x right parenthesis vertical line less or equal than 5 for all x greater than 0
Statement -2:left parenthesis f left parenthesis x right parenthesis right parenthesis to the power of 2 end exponent plus open parentheses f to the power of ´ end exponent left parenthesis x right parenthesis close parentheses to the power of 2 end exponent is decreasing for all x greater than 0.

  1. Statement-1 is True,Statement-2 is True;Statement-2 is a correct explanation for Statement-1    
  2. Statement -1 is True, Statement -2 is True;Statement-2 is NOT a correct explanation for Statement-1    
  3. Statement -1 is True, Statement -2 is False    
  4. Statement -1 is False, Statement -2 is True.    

The correct answer is: Statement-1 is True,Statement-2 is True;Statement-2 is a correct explanation for Statement-1


    fraction numerator d left parenthesis f left parenthesis x right parenthesis right parenthesis to the power of 2 end exponent plus open parentheses f to the power of ´ end exponent left parenthesis x right parenthesis close parentheses to the power of 2 end exponent over denominator d x end fraction equals 2 f to the power of ´ end exponent left parenthesis x right parenthesis open parentheses f left parenthesis x right parenthesis plus f to the power of ´ ´ end exponent left parenthesis x right parenthesis close parentheses equals negative 2 x g left parenthesis x right parenthesis open parentheses f to the power of ´ end exponent left parenthesis x right parenthesis close parentheses to the power of 2 end exponent less than 0 for all x greater than 0
    table row cell therefore left parenthesis f left parenthesis x right parenthesis right parenthesis to the power of 2 end exponent less than 25 minus open parentheses f to the power of ´ end exponent left parenthesis x right parenthesis close parentheses to the power of 2 end exponent less than 25 end cell row cell therefore vertical line f left parenthesis x right parenthesis vertical line less than 5. end cell end table

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