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TS EAMCET · Maths · Continuity and Differentiability

The function that is not differentiable at \(x=1\) is

  1. A \(f_1(x)=|x|,-\infty < x < \infty\)
  2. B \(f_2(x)=\left\{\begin{array}{cc}1+\sin (x-1), & -\infty < x \leq 1 \ x & x \geq 1\end{array}\right.\)
  3. C \(f_3(x)=\left\{\begin{array}{cc}x^2+7 x-7, & -\infty < x \leq 1 \ \frac{3 x-1}{2}, & x \geq 1\end{array}\right.\)
  4. D \(f_4(x)=\left\{\begin{array}{cc}|x-1|+|x-2|, & -\infty < x \leq 1 \ 1+x-x^3, & x \geq 1\end{array}\right.\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(f_4(x)=\left\{\begin{array}{cc}|x-1|+|x-2|, & -\infty < x \leq 1 \ 1+x-x^3, & x \geq 1\end{array}\right.\)

Step-by-step Solution

Detailed explanation

We have,…