JEE Main & Advanced Sample Paper JEE Main Sample Paper-12

  • question_answer
    Statement 1: The line \[\frac{x}{a}+\frac{y}{b}=1\] touches the curve \[y=b{{e}^{-x/a}}\] at some point \[x={{x}_{0}}.\]
    Statement 2: \[\frac{dy}{dx}\] exists at \[x={{x}_{0}}\].

    A)  Statement-1 is false, Statement-2 is true.

    B)  Statement-1 is true.statement-2 is true and statement- is correct explanation for statement-1

    C)  Statement-1 is true, statement-2 is true and statement-2 is NOT correct explanation for statement-1

    D)  Statement-1 is true, Statement-2 is false.

    Correct Answer: C

    Solution :

     Line touches the curve at (0, b) and \[={{\left. \frac{dy}{dx} \right]}_{x=0}}\]also exists but even if \[\frac{dy}{dx}\] fails to exist tangents line can be drawn.


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