如何求这个英文数学题:marcus is typinga paper for his English class.the top margin must be a 1/2
题目
如何求这个英文数学题:marcus is typinga paper for his English class.the top margin must be a 1/2
inch and the bottom margin must be 3/4 inch.if the paper is 11 inches long,what is the length of the page inside the margin?
答案
问题是说整个纸的长度是11英尺,然后纸上面要留1/2英尺的空白,下面要留3/4英尺空白,那么纸中间长度是多少?所以答案是:11 inches - 1/2 inch - 3/4 inch = 9.75 inches
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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