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The volume of the rotating body, when y=ax^n is rotated on the y axis

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As shown in the figure, find the volume V of the rotating body that is created when the area surrounded by y=ax^n, y=y1, and x=0 is rotated on the y-axis.

x = (y/a)^(1/n)

Therefore, it is integrated from y = 0 to y = y1.

V = ¥ð¡òx^2 dy
 = ¥ð¡ò(y/a)^(2/n) dy
 = ¥ð(1/a)^(2/n)¡òy^(2/n) dy
 = ¥ð(1/a)^(2/n)[(n/(n+2))y^((n+2)/n)]
 = ¥ð(1/a)^(2/n)(n/(n+2))y1^((n+2)/n)

*** Âü°í¹®Çå[References] ***

V = (1/a)^(2/n)*(n/(n+2))*y1^((n+2)/n)*¥ð
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