समाकलित करें:

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Airforce Group X MBT 14-Jul-2021 Shift 1
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  1. x (log x + 1) + C
  2. log x - x + C
  3.  + C
  4. x (log x - 1) + C

Answer (Detailed Solution Below)

Option 4 : x (log x - 1) + C
Free
Electric charges and coulomb's law (Basic)
10 Qs. 10 Marks 10 Mins

Detailed Solution

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संकल्पना:

खंडशः समाकलन:

∫ f(x) g(x) dx = f(x) ∫ g(x) dx - ∫ [f'(x) ∫ g(x) dx] dx

निश्चित समाकल:

यदि ∫ f(x) dx = g(x) + C तो  = g(b) - g(a)

गणना:

माना कि I = ∫ (1)(log x) dx

पहले फलन के रूप में log x और दूसरे फलन के रूप में 1 को देखते हुए हमें मिलता है:

= (log x) ∫ 1 dx - ∫ [ ∫ 1 dx] dx

= (log x) x - x + C

= x (log x - 1) + C

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