मराठी

Evaluate the following: d∫xx4-1dx - Mathematics

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प्रश्न

Evaluate the following:

`int x/(x^4 - 1) "d"x`

बेरीज
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उत्तर

Let I = `int x/(x^4 - 1) "d"x`

Put x2 = t

⇒ 2x dx = dt

⇒ x dx = `"dt"/2`

`1/2 int "dt"/("t"^2 - 1) = 1/2 int "dt"/("t"^2 - (1)^2)`

= `1/2 * 1/(2 * 1) log |("t" - 1)/("t" + 1)| + "C"`  ....`[because int 1/(x^2 - "a"^2) "d"x = 1/(2"a") log |(x - "a")/(x + "a")| + "C"]`

= `1/4 log |(x^2 - 1)/(x^2 + 1)| + "C"`

Hence, I = `1/4 log |(x^2 - 1)/(x^2 + 1)| + "C"`

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पाठ 7: Integrals - Exercise [पृष्ठ १६४]

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एनसीईआरटी एक्झांप्लर Mathematics [English] Class 12
पाठ 7 Integrals
Exercise | Q 18 | पृष्ठ १६४

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