\(\int_{1}^{4} x \sqrt{x} dx \)

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  1. 12.8
  2. 14
  3. 7
  4. 12.4

Answer (Detailed Solution Below)

Option 4 : 12.4
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संप्रत्यय:

बीजीय फलनों का समाकलन:

  • दिया गया समाकल एक निश्चित समाकल है जिसमें x की घातें शामिल हैं।
  • हम सर्वसमिका का उपयोग करके व्यंजक को सरल करते हैं: √x = x1/2
  • नियम का प्रयोग करें: \( \int x^n dx = \frac{x^{n+1}}{n+1} + C \), जहाँ n ≠ −1 है।
  • निश्चित समाकलों के लिए, समाकलन के बाद सीमाएँ लागू करें: \( \int_a^b f(x) dx = F(b) - F(a) \)

 

गणना:

दिया गया है,

\( \int_{1}^{4} x \sqrt{x} dx \)

⇒ x × √x = x × x1/2 = x3/2

\( \int_{1}^{4} x^{3/2} dx \)

\( \left[\frac{x^{5/2}}{5/2}\right]_{1}^{4} \)

\( \left[\frac{2}{5} x^{5/2}\right]_{1}^{4} \)

\( \frac{2}{5}(4^{5/2} - 1^{5/2}) \)

⇒ 45/2 = (√4)5 = 25 = 32

⇒ 15/2 = 1

\( \frac{2}{5}(32 - 1) = \frac{2}{5} \times 31 = \frac{62}{5} \) = 12.4

∴ निश्चित समाकल का मान 12.4 है।

Latest Army Havildar SAC Updates

Last updated on Jul 1, 2025

-> The Indian Army has released the Exam Date for Indian Army Havildar SAC (Surveyor Automated Cartographer).

->The Exam will be held on 9th July 2025.

-> Interested candidates had applied online from 13th March to 25th April 2025.

-> Candidates within the age of 25 years having specific education qualifications are eligible to apply for the exam.

-> The candidates must go through the Indian Army Havildar SAC Eligibility Criteria to know about the required qualification in detail. 

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