मराठी

∫ X 2 − 1 X 2 + 4 D X

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प्रश्न

\[\int\frac{x^2 - 1}{x^2 + 4} dx\]
बेरीज
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उत्तर

\[\int\frac{x^2 - 1}{x^2 + 4}dx \]
\[ = \int\left( \frac{x^2 + 4 - 4 - 1}{x^2 + 4} \right)dx \]
\[ = \int\left( \frac{x^2 + 4}{x^2 + 4} \right)dx - 5\int\frac{dx}{x^2 + 2^2}\]
\[ = \int dx - 5\int\frac{dx}{x^2 + 2^2}\]
\[ = x - \frac{5}{2} \tan^{- 1} \left( \frac{x}{2} \right) + C \left[ \therefore \int\frac{dx}{x^2 + a^2} = \frac{1}{a} \tan^{- 1} \left( \frac{x}{a} \right) + C \right]\]

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पाठ 18: Indefinite Integrals - Exercise 19.14 [पृष्ठ ८३]

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आर.डी. शर्मा Mathematics Volume 1 and 2 [English] Class 12
पाठ 18 Indefinite Integrals
Exercise 19.14 | Q 4 | पृष्ठ ८३
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