एक निश्चित समाकलन, जो नीचे दी गई है, हल कर सही विकल्प चुनिये:

\(\rm\displaystyle\int_0^4\)(x + 1) dx

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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
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  1. 10
  2. 12
  3. 14
  4. 16

Answer (Detailed Solution Below)

Option 2 : 12
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Bihar STET Paper 1 Mathematics Full Test 1
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Detailed Solution

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दिया गया है:

f(x) = \(\rm\displaystyle∫_0^4 \)(x + 1) dx

गणना:

⇒  \(\rm\displaystyle∫_0^4 \)(x + 1)dx = \(\rm\displaystyle∫_0^4 \)x dx  + \(\rm\displaystyle∫_0^4 \)1 dx

⇒  \(\left[\dfrac{x^2}{2}\right]^4_0 \) + \(\left[x\right]^4_0 \)

\(\left[\dfrac{4^2}{2} - \dfrac{0^2}{2}\right]^4_0 \) + 4 - 0

⇒ 8 + 4 = 12

∴ \(\rm\displaystyle\int_0^4 \)(x + 1) dx = 12

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