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JEE Mains · Maths · STD 12 - 7.2 definite integral

\(\int_{1}^{3}\left[ x ^{2}-2 x -2\right] dx\) નું મૂલ્ય ....... છે, જ્યાં \([x]\) એ \(x\) કે તેથી નાનો મહત્તમ પૂર્ણાંક દર્શાવે છે.

  1. A \(-\sqrt{2}-\sqrt{3}+1\)
  2. B \(-\sqrt{2}-\sqrt{3}-1\)
  3. C \(-5\)
  4. D \(-4\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(-\sqrt{2}-\sqrt{3}-1\)

Step-by-step Solution

Detailed explanation

\(\int_{1}^{3}\left(\left[(x-1)^{2}\right]-3\right) d x\) \(=\int_{1}^{2}\left[x^{2}\right]-3 \int_{1}^{3} d x\) \(=\int_{1}^{3} 0 \cdot d x+\int_{1}^{\sqrt{2}} 1 \cdot d x+\int_{\sqrt{2}}^{\sqrt{3}} 2 \cdot d x+\int_{\sqrt{3}}^{2} 3 \cdot d x-6\)…
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