标题: where comes the 根号 [打印本页] 作者: gansen 时间: 2002-9-16 17:08 标题: where comes the 根号
following is a PS maths from jj 总结. i don't understand where comes the 根号
某食品成份是4 fat and 6 protein per service (老美的习惯,对食品都是以一客为单位标明成份) ,其中卡路里含量是9 per fat and 4 per protein. 问对每客而言,fat的卡路里含量比protein多多少。
【确认】4+根号15
R: 12(跟号5+跟号3)/( 跟号5-跟号3)作者: tongxun 时间: 2002-9-16 17:28