求问几道gre数学题1.Yesturday the average number of cars per hour th
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求问几道gre数学题
1.Yesturday the average number of cars per hour that passed point P was 34 between 1:00p.m.and 8:00p.m.and was x between 2:00p.m.and 7:00p.m.问x与34比较大小.
这道题不是34/8-1=x/7-2么.
2.a>b,c>d,a>c,问b和d的关系(为啥不是b〉d?)
3.x>0,问根号下x与根号下x^2比较大小
4.请问这句英文是什么意思:The sum of 30 and the number of five-dollar bills in the cash register.
5.请问一个圆圈里有个叉,题干是:For all real numbers x and y,x圆圈叉y=x^2-y^2,问14圆圈叉15与15圆圈叉14比较大小
1.Yesturday the average number of cars per hour that passed point P was 34 between 1:00p.m.and 8:00p.m.and was x between 2:00p.m.and 7:00p.m.问x与34比较大小.
这道题不是34/8-1=x/7-2么.
2.a>b,c>d,a>c,问b和d的关系(为啥不是b〉d?)
3.x>0,问根号下x与根号下x^2比较大小
4.请问这句英文是什么意思:The sum of 30 and the number of five-dollar bills in the cash register.
5.请问一个圆圈里有个叉,题干是:For all real numbers x and y,x圆圈叉y=x^2-y^2,问14圆圈叉15与15圆圈叉14比较大小
1、不可比,比如1点到8点通过P点的车量数是238辆,其中2点到7点通过P点的车辆100辆,则x=20,x34.所以是不可比的.
2、不可比.例子别人已经举过了.
3、已经有人解释得很清楚了.
4、30与收款机里5美元面额钞票的数量(即张数)之和
5、这里,圆圈里有个叉表示一种运算关系,这种运算关系的定义是第一个数的平方减去第二个数的平方,因此14圈叉15=14^2-15^2=-29,15圈叉14=15^2-14^2=29,所以14圈叉15
2、不可比.例子别人已经举过了.
3、已经有人解释得很清楚了.
4、30与收款机里5美元面额钞票的数量(即张数)之和
5、这里,圆圈里有个叉表示一种运算关系,这种运算关系的定义是第一个数的平方减去第二个数的平方,因此14圈叉15=14^2-15^2=-29,15圈叉14=15^2-14^2=29,所以14圈叉15
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