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

फलन \(f(\mathrm{x})=\left[\frac{\mathrm{x}^2}{2}\right]-[\sqrt{\mathrm{x}}], \mathrm{x} \in[0,4]\) के असंततता के बिंदुओं की संख्या, जहाँ \([\cdot]\) महत्तम पूर्णांक फलन को निरूपित करता है, वह ___ है।

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

Correct Answer

(D) 8

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Detailed explanation

Check for \(\left[\frac{x^2}{2}\right]\) and \([\sqrt{x}]\) becomes integers. \(\{0,1, \sqrt{2}, 2, \sqrt{6}, \sqrt{8}, \sqrt{10}, \sqrt{12}, \sqrt{14}, 4\}\) Continuous at \(0^{+}\), continuous at \(4^{-}\) \(\left[\frac{x^2}{2}\right]=[\sqrt{x}]\), occurs at \(x=\sqrt{2}\)…
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