58赌博

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58赌博2.2.2 xiangliangjianfayunsuanjiqijiheyiyi

58赌博xueximubiao 1.lejiexiangfanxiangliang.

2.lijiexiangliangjianfafazejiqijiheyiyi.

58赌博3.nengyongfazejiqijiheyiyi,zhengquezuochulianggexiangliangdecha.

【yuxian】

58赌博1.duiyufeilingxianglianga 、b ,ruo|a +b |=|a |+|b |,zea yub manzu_______ 2.duiyushishua ,b laishuo,a -b =a +_________ 3.xiangfanxiangliang

58赌博(1)dingyi:ruguolianggexiangliangzhangdu_____,erfangxiang____,neimechengzheilianggexiangliangshixiangfanxiangliang. (2)xingzhi:①duiyuxiangfanxiangliangyou:a +(-a )=0. ②ruoa ,b huweixiangfanxiangliang,zea =-b ,a +b =0. ③lingxiangliangdexiangfanxiangliangrengshilingxiangliang. 4.xiangliangdejianfa

58赌博(1)dingyi:a -b =a +(-b ),jijianquyigexiangliangxiangdangyujiashangzheigexiangliangde___________

2.2.2向量减法运算及其几何意义导学案

2.2.2向量减法运算及其几何意义导学案

(2)zuofa:zaipingmianneirenquyidiano ,zuooa

→=a ,ob →=b ,zexianglianga -b =ba →.rutusuoshi: (3)jiheyiyi:ruguobalianggexiangliangdeqidianfangzaiyiqi,zezheilianggexiangliangdechashiyijianxiangliangde_____

58赌博weiqidian,yibeijianxiangliangde_______weizhongdiandexiangliang.

【tanjiuan】

wentitanjiu

1.ruoa -c =d -b ,zea +b =c +d ,chenglima?

2.pingxingsibianxingzhong,ruhetixianxiangliangjianfayunsuan?

58赌博3.||a |-|b ||、|a |+|b |yu|a +b |youshenmeguanxi?

kaodianyi:liyongfazeqiuzuoxiangliang

yongyouxiangxianduanbiaoshixiangliang,genjusanjiaoxingfazehuopingxingsibianxingfazezuochuxiangyingdeyouxiangxianduan liyi

rutusuoshi,o wei△abc neiyidian,oa →=a ,ob →=b ,oc →=c . qiuzuo:b +c -a .

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