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Integration, area between y=ax^n and y-axis

ÀÛ¼ºÀÚ Uploader : pleiades ÀÛ¼ºÀÏ Upload Date: 2019-03-12º¯°æÀÏ Update Date: 2019-10-22Á¶È¸¼ö View : 277

The area between a function of y = a*x^n (n¡Ã0, x¡Ã0) and the y-axis can be obtained as follows.

Firstly, calculate the area between the function and x-axis.

Ax = ¡ò y dx = ¡ò a*x^n dx = (a/(n+1))*x^(n+1)

Area from 0 to x1,

Ax = (a/(n+1))*x1^(n+1)

Then, subtract the above area from x1*y1.

A = x1*y1 - Ax = x1*y1 - (a/(n+1))*x1^(n+1)

Since y1 = ax1^n,

A = ax1^(n+1) - (a/(n+1))*x1^(n+1)
 = a*(1-1/(n+1))*x1^(n+1)

*** Âü°í¹®Çå[References] ***

A = a*(1-1/(n+1))*x1^(n+1)
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