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महाराष्ट्र राज्य शिक्षण मंडळएचएससी वाणिज्य (इंग्रजी माध्यम) इयत्ता १२ वी

Evaluate ∫(3x2-5)2 dx

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प्रश्न

Evaluate `int (3"x"^2 - 5)^2` dx

बेरीज
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उत्तर

Let I = `int (3"x"^2 - 5)^2` dx

`= int (9"x"^4 - 30"x"^2 + 25)` dx

`= 9 int "x"^4 "dx" - 30 int "x"^2 "dx" + 25 int "dx"`

`= 9 ("x"^5/5) - 30 ("x"^3/3)` + 25x + c

∴ I = `9/5 "x"^5 - 10"x"^3 + 25"x" + "c"`

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पाठ 5: Integration - EXERCISE 5.1 [पृष्ठ ११९]

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