Bihar BoardHindi Mediumकक्षा 12 साइन्सगणितसमाकलन2 Marks
Question
सिद्ध कीजिए $\int_{-1}^{1}$ x17 cos4x dx = 0
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Answer
माना f(x) = x17 cos4x, $\Rightarrow$ f(-x) = (-x)17 cos4(-x) = - x17 cos4 x = - f(x) अतः f(x) एक विषम फलन है। हम जानते हैं कि यदि f(x) एक विषम फलन हो, तो $\int_{-a}^{a}$ f(x) dx = 0 $\therefore \int_{-1}^{1}$ x17 cos4 x dx = 0
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