수식 4: Start integral from 0 to pi "r" , end integral, left parenthesis, pi "r" , right parenthesis "f" left parenthesis, "x" , right parenthesis "d" "x" plus Start integral from 2 pi "r" to pi "r" , end integral, left parenthesis, pi "r" , right parenthesis "f" left parenthesis, "x" , right parenthesis "d" "x"∫πr0πrfxdx+∫πr2πrπrfxdx
equals=
12.5 6 6 3 7 0 6 1 4 412.5663706144
4
수식 5: 0 less than or equal to "y" less than or equal to "f" left parenthesis, "x" , right parenthesis left brace, 0 less than or equal to "x" less than or equal to 2 pi "r" , right brace0≤y≤fx0≤x≤2πr
5
수식 6: "f" left parenthesis, "x" , right parenthesis less than or equal to "y" less than or equal to 0 left brace, 0 less than "x" less than or equal to 2 pi "r" , right bracefx≤y≤00<x≤2πr
