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Evaluate the following : ∫04[x2+2x+3]-1⋅dx - Mathematics and Statistics

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Question

Evaluate the following : `int_0^4 [sqrt(x^2 + 2x + 3]]^-1*dx`

Sum
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Solution

Let I = `int_0^4 [sqrt(x^2 + 2x + 3]]^-1*dx`

= `int_0^4 1/sqrt(x^2 + 2x + 1 + 2)*dx`

= `int_0^4 1/sqrt((x + 1)^2 + 2)*dx`

= `[log [x + 1 + sqrt((x + 1)^2 + 2)]_0^4`

= `log[4 + 1 + sqrt(5^2 + 2)] - log[0 + 1 + sqrt(1^2 + 2)]`

= `log(5 + 3sqrt(3)) - log(1 + sqrt(3))`

= `log((5 + 3sqrt(3))/(1 + sqrt(3)))`.

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Chapter 4: Definite Integration - Miscellaneous Exercise 4 [Page 176]

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Balbharati Mathematics and Statistics 2 (Arts and Science) [English] Standard 12 Maharashtra State Board
Chapter 4 Definite Integration
Miscellaneous Exercise 4 | Q 3.09 | Page 176
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