求英语帝数学帝进麻烦解下题,GIVE the vectors 向量a=(1,2,3),向量b＝(3,2,1) and 向量c＝(1,1,1)a) Calculate the angle & between 向量a and 向量b.b) Calculate:(向量a x 向量b)x 向量c.x＝乘c）what can you say about the vecto

求英语帝数学帝进麻烦解下题,GIVE the vectors 向量a=(1,2,3),向量b＝(3,2,1) and 向量c＝(1,1,1)a) Calculate the angle & between 向量a and 向量b.b) Calculate:(向量a x 向量b)x 向量c.x＝乘c）what can you say about the vecto 麻烦大家帮我翻译句英语The boy haven't give the dog any sandwich. 麻烦帮忙解下这个高二数学选修2－1的题. 求一道数学概率题,讲解下～谢谢 求解下题：八年级 数学竞赛谢谢 求解下题：八年级 数学竞赛asd 数学不好这2题求高手解下,谢谢啦 第二题麻烦给我讲解下. 三题,希望各位麻烦解下 求用方程解下列两道数学应用题. 几道初一初二的数学几何题,数学爱好者的大哥大姐们帮忙解下吧.标好题号,麻烦了.可以告诉突破点,当然有过程最好. 麻烦解下方程, 麻烦讲解下 高一数学,14题讲解下 求大神解下2,4题要过程(高一数学) 求帮解下这3题!小弟我数学完全不行啊 求解下段英语的意思.whatever you are facing today remember to give yourself some credi...求解下段英语的意思.whatever you are facing today remember to give yourself some credit for making to the far .you are stronger than you know . Don't give up 求字母美化