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

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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

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
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

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
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,x<34;而另外一种情况,2点到7点通过P点的车数是200辆,则x=40,x>34.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<15圈叉14.

1.x=34,34是1:00p.m.到8:00p.m.间每小时经过P点的车辆数,而2:00p.m.到7:00p.m.在上述时间范围之内,因此x=34
2.由a>c, c>d, 我们能知道a>d, 但无法比较b和d的大小,比如a=8, c=6, d=4, 而b只要<8就可以
3.y=√x是增函数,因此只要比较根号下的大小就可以。01时,...

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1.x=34,34是1:00p.m.到8:00p.m.间每小时经过P点的车辆数,而2:00p.m.到7:00p.m.在上述时间范围之内,因此x=34
2.由a>c, c>d, 我们能知道a>d, 但无法比较b和d的大小,比如a=8, c=6, d=4, 而b只要<8就可以
3.y=√x是增函数,因此只要比较根号下的大小就可以。01时,x4. 30+cash register上5美元账单的数量
5. 根据x圆圈叉y=x^2-y^2,14圆圈叉15=14^2-15^2=-29<15圆圈叉14=15^2-14^2=29,

收起

1.x>=34
2.由于b,c关系未知,所以b和d的大小关系不能判定
3.根号下x<根号下x^2比较大小
4.收银机总和是30,问5美元的个数是多少?
5.14圆圈叉15=14^2-15^2=-29
15圆圈叉14=29
所以<

2明显错,5>1,4>3,5>4,1<3