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JEE Mains · Maths · STD 12 - 5. continuity and differentiation

माना \([x]\) महत्तम पूर्णांक \(\leq x\) है, तो अंतराल \((-2,1)\) में उन बिंदुओं, जहाँ फलन \(\mathrm{f}(\mathrm{x})=|[\mathrm{x}]|+\sqrt{\mathrm{x}-[\mathrm{x}}]\) असंतत है, की संख्या है__________

  1. A \(4\)
  2. B \(6\)
  3. C \(8\)
  4. D \(2\)
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Answer & Solution

Correct Answer

(D) \(2\)

Step-by-step Solution

Detailed explanation

Need to check at doubtful points discont at \(x \in I\) only at \(x=-1 \Rightarrow f\left(-1^{+}\right)=1+0=1\) \(\Rightarrow f\left(-1^{-}\right)=2+1=3\) at \(x=0 \Rightarrow f\left(0^{+}\right)=0+0=0\) \(\Rightarrow f \left(0^{-}\right)=1+1=2\) at…
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