å 说ä¸é¢ç®ä¸çé®é¢ï¼
æ¡ä»¶å²çªï¼å½-1â¤A1â¤1æ¶ï¼B1=0ï¼å½A1â¥1æ¶ï¼B1=A1*C1ãè¿ä¸¤ä¸ªæ¡ä»¶æéå é¨åï¼A1=1æ¶ï¼åºè¯¥æåªä¸ä¸ªæ¡ä»¶è®¡ç®ï¼
æ¡ä»¶åºåä¸å ¨ï¼å½A1ï¼-1æ¶ï¼B1çå¼å¦ä½è®¡ç®ï¼
å设æ¨çæ¡ä»¶ä¸ºï¼â å½A1ï¼-1æ¶ï¼B1=A1*2ï¼â¡å½-1â¤A1<1æ¶ï¼B1=0ï¼â¢å½A1â¥1æ¶ï¼B1=A1*C1ã
B1å ¬å¼=if(a1<-1,a1*2,if(and(a1>=-1,a1<1),0,if(a1>=1,a1*c1)))ï¼ä¹å¯ä»¥å为=if(a1<-1,a1*2,if(a1<1,0,if(a1>=1,a1*c1)))