Comprehension

निर्देश : निम्नलिखित प्रश्नों के लिए नीचे दिए गए कथनों पर विचार करें:

माना f(x) = |x2 - x - 2|

\(\rm \int_0^2f(x)dx\) किसके बराबर है?

This question was previously asked in
NDA-II 2024 (Maths) Official Paper (Held On: 01 Sept, 2024)
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  1. 0
  2. 1
  3. 5/3
  4. 10/3

Answer (Detailed Solution Below)

Option 4 : 10/3
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व्याख्या:

दिया गया है:

f(x) =|x2 - x - 2|.

= {x2 - x - 2; x ∈ (-∞ -1) ∪ (2,∞ ) - (x2 - x - 2); x ∈ [-1, 2]

माना I = - \(\int_0^2(x^2 – x – 2)dx\)

= - \([\frac{x^3}{3}-\frac{x^2}{2} -2x]_2^0\)

= \(- [\frac{8}{3}-\frac{4}{2}+4] +0 =\frac{10}{3}\)

∴ विकल्प (d) सही है

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