JEE Main & Advanced Mathematics Functions Question Bank Functions

  • question_answer
    If \[y=f(x)=\frac{ax+b}{cx-a}\], then x is equal to [AMU 2001]

    A)            \[1/f(x)\]

    B)            \[1/f(y)\]

    C)            \[yf(x)\]

    D)            \[f(y)\]

    Correct Answer: D

    Solution :

               \[y=\frac{ax+b}{cx-a}\] Þ \[x(cy-a)=b+ay\] Þ \[x=\frac{ay+b}{cy-a}=f(y)\].


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