提问几道GRE绿皮数学题
题目
提问几道GRE绿皮数学题
P58
The toll for a certain bridge is $0.15 or 1 token.Tokens are sold in packs of 40 for $4.00.The percenty save on 40 trips across the bridge if a token,rather than $0.15,is used to pay each toll与66又2/3比大小 答案是后者大 这题啥意思?
P53
The area of a tablecloth that overhangs a square tabletop by 3 inches on all sides与The area of a tablecloth that overhangs a rectangular tabletop by 2 inches on al sides比大小 答案是不确定 这题怎么翻译?
P52
100^2与2^100比大小 答案是后者大 咋算?
答案
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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