This is the first lesson of the new termWelcome back to school,boys and girls.的意思是虾米?

相关推荐

• This is the first lesson of the new termWelcome back to school,boys and girls.的意思是虾米?
• This is the first lesson of the new termWelcome back to school,boys and girls.的意思是虾米?
• 一道向量的判断题设a,b,c是任意的非零平面向量,互相不共线,则下列哪些说法是正确的：1.（a*b)*c-(c*a)*b=02.|a|-|b|＜|a-b|3.(b*c)*a-(c*a)*b不与c垂直4.（3a+2b)*(3a-2b)=9|a|²-4|b|²希望有解析……谢谢
• 判断题：线性无关的向量组中可以包含两个成比例的向量