ç±äºï¼F(+æ ç©·ï¼+æ ç©·)=1,å¾A(B+pi/2)(C+pi/2)=1.(1)ç±äºï¼F(-æ ç©·ï¼y)=0,ç¹å«æFï¼-æ ç©·ï¼0ï¼=0ãå¾ï¼A(B-pi/2)(C)=0.(2)ç±äºï¼F(x,-æ ç©·)=0,ç¹å«æï¼F(0,-æ ç©·ï¼=0ãå³ï¼A(B)(C-pi/2)=0.(3)ç±äº(1),(2),(3),并注æå°0<=F(x,y)<=1,ç¥éAãBãCé½ä¸ä¸º0ï¼ä¸è§£å¾ï¼B=C=pi/2,A=1/(pi)^2.
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