1年前2个回答
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曲线中对应点如何计算?这样一题:x=sint,y=cos2t 求曲线在t=π/4处对应的点的切线方程.答案上只说一句t=
1年前
the competition among them is fierce,and everyone has a ___
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Dear Bob,Hello. I learn about you from my English teacher, 1
1年前
当m,n为何值时,y=(2m-1)x的5-2n+(n+m)是一次函数?何值时为正比例函数?
1年前
Is John strong?a:yes,he is b:No he is sick c:yes,he looks he
1年前