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JEE Mains · Maths · STD 12 - 8. Application and integration

क्षेत्र \(A =\{( x , y ):( x -1)[ x ] \leq y \leq 2 \sqrt{ x }, 0 \leq x \leq 2\}\), जहाँ [ \(t ]\) महत्तम पूर्णांक फलन है, का क्षेत्रफल ( वर्ग इकाईयों में) है

  1. A \(\frac{8}{3} \sqrt{2}-\frac{1}{2}\)
  2. B \(\frac{8}{3} \sqrt{2}-1\)
  3. C \(\frac{4}{3} \sqrt{2}-\frac{1}{2}\)
  4. D \(\frac{4}{3} \sqrt{2}+1\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\frac{8}{3} \sqrt{2}-\frac{1}{2}\)

Step-by-step Solution

Detailed explanation

\(( x -1)[ x ] \leq y \leq 2 \sqrt{ x }, \quad 0 \leq x \leq 2\) Draw \(y =2 \sqrt{ x } \Rightarrow y ^{2}=4 x \quad x \geq 0\) \(y =( x -1)[ x ]=\left\{\begin{array}{c}0 \quad, 0 \leq x <1 \\ x -1,1 \leq x <2 \\ 2, \quad x =2\end{array}\right.\)…
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