Maths-
General
Easy

Question

Number of solutions of the equation  tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 2 x plus 1 end fraction close parentheses plus tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 4 x plus 1 end fraction close parentheses equals tan to the power of negative 1 end exponent invisible function application open parentheses 2 over x squared close parentheses is

  1. 1
  2. 2
  3. 3
  4. 4

The correct answer is: 2


    Given,
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 2 x plus 1 end fraction close parentheses plus tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 4 x plus 1 end fraction close parentheses end cell row cell equals tan to the power of negative 1 end exponent invisible function application open parentheses 2 over x squared close parentheses end cell row cell not stretchy rightwards double arrow tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator fraction numerator 1 over denominator 2 x plus 1 end fraction plus fraction numerator 1 over denominator 4 x plus 1 end fraction over denominator 1 minus fraction numerator 1 over denominator 2 x plus 1 end fraction cross times fraction numerator 1 over denominator 4 x plus 1 end fraction end fraction close parentheses end cell row cell not stretchy rightwards double arrow tan to the power of negative 1 end exponent invisible function application open parentheses 2 over x squared close parentheses end cell row cell not stretchy rightwards double arrow tan to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 6 x plus 2 over denominator 8 x squared plus 6 x end fraction close parentheses equals tan to the power of negative 1 end exponent invisible function application open parentheses 2 over x squared close parentheses end cell end table
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell not stretchy rightwards double arrow 6 x cubed plus 2 x squared equals 16 x squared plus 12 x end cell row cell not stretchy rightwards double arrow 6 x cubed minus 14 x squared minus 12 x equals 0 end cell row cell not stretchy rightwards double arrow 2 x open parentheses 3 x squared minus 7 x minus 6 close parentheses equals 0 end cell row cell not stretchy rightwards double arrow 2 x left parenthesis 3 x plus 2 right parenthesis left parenthesis x minus 3 right parenthesis equals 0 end cell row cell not stretchy rightwards double arrow x equals 0 comma negative 2 over 3 comma 3 end cell end table
    But x equals negative 2 over 3 does not satisfy the given relation

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