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JEE Mains · Maths · STD 12 - 7.2 definite integral

यदि \(\int \limits_{- a }^{ a }(| x |+| x -2|) dx =22,( a >2)\) है तथा [ \(x ]\), महत्तम पूर्णांक \(\leq x\) को दर्शाता है, तो \(\int \limits_{ a }^{- a }( x +[ x ]) dx\) बराबर है ....... |

  1. A \(2\)
  2. B \(3\)
  3. C \(4\)
  4. D \(5\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(3\)

Step-by-step Solution

Detailed explanation

\(\int_{-a}^{0}(-2 x+2) d x+\int_{0}^{2}(x+2-x) d x+\int_{2}^{a}(2 x-2) d x=22\) \(x^{2}-\left.2 x\right|_{0} ^{-a}+\left.2 x\right|_{0} ^{2}+x^{2}-\left.2 x\right|_{0} ^{a}=22\) \(a^{2}+2 a+4+a^{2}-2 a-(4-4)=22\) \(2 a^{2}=18 \Rightarrow a=3\)…
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