写给2b的情书
反正二逼写一封信,诉说自己的苦恼估计大致多少
其实说实话每个人都是有古老的,只是看你自己怎么去发掘而已。
a+2b与a-2b的大小关系是(写出各种可能性)
大于小于等于都有可能b>0 a+2b>a-2bb=0 a+2b=a-2bb<0 a+2b用500行html语句编写一个网页 ,简单点就好 老师布置的2b作业啊。
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500行 一般情况下是没有一张网页超过5oo行代码的,不过你可以去csdn 下载 ,那里很多的
描写人物衣着打扮的句子
说清楚什么样的人啊,否则别人有心帮你也爱莫能助了
2b的那个作文怎么写急用
I and my father, mother, grandparents, brother went to changbaishan by bus. In the morning we came down the mountain. I saw wooded mountains, wild flowers bloom. We climb up the hill along the mountain path. Come halfway up the mountain, I feel a little tired,it began to rain,My West Lake silk umbrella missed,. Dad said to me,“zhaixiaowei, don’t do anything halfway.”at last,So I insisted reached the top, the top of the scenery so beautiful.We were flying kites, I was thirsty, my mother bought me a bottle of water, .finally we went home.finally,Since then, I've kept the umbrella。
角A=角2B是否可以写成cosA=cos2B?而a=2b却可以写成sinA=sin2b,为什么
大写字母是角,小写字母是边,这个要分清。
∠A=2∠B可以写成cosA=cos2B,没错,等角余弦相等;a\\\/sinA=b\\\/sinB,这是正弦定理,a=2b,则2b\\\/sinA=b\\\/sinBsinA=2sinB不是sinA=sin2B
b十2可以写成2b,对吗
不可以,b十2表示b与2之和2b表示2*b, 字母和数字一起的时候数字在前表示其系数,即两者相乘,2b也不可以写成b2
(a-2b)(—a-2b)怎莫写
(a-2b)(-a-2b)=-(a-2b)(a+2b)=-a^2+4b^2