Consider  $f (x) = | 1 - x | \,;\,1 \le x \le 2 $   and $g (x) = f (x) + b sin\,\frac{\pi }{2}\,x$, $1 \le x \le 2$  then which of the following is correct ?

  • A

    Rolles theorem is applicable to both $f, g$ and $b =\frac{3}{2}\,$

  • B

    $LMVT$ is not applicable to $f$ and Rolles theorem if applicable to $g$ with $b =\frac{1}{2}\,$

  • C

    $LMVT$ is applicable to $f$ and Rolles theorem is applicable to $g$ with $b = 1$

  • D

    Rolles theorem is not applicable to both $f, g$ for any real $b.$

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Consider a quadratic equation $ax^2 + bx + c = 0,$ where $2a + 3b + 6c = 0$ and let $g(x) = a\frac{{{x^3}}}{3} + b\frac{{{x^2}}}{2} + cx.$

Statement $1:$ The quadratic equation has at least one root in the interval $(0, 1).$

Statement $2:$ The Rolle's theorem is applicable to function $g(x)$ on the interval $[0, 1 ].$

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