1、两条直线比斜率:
一条x轴intercede 3,y轴intercede 4, 和一条x轴intercede 4,一个y轴intercede 3。
解:slope1=/=-4/3 slop2=/=-3/4
注意由于两条直线的斜率是负数, 后者斜率大一些。
2、直线y+x=4, 与x^2+y=4交点的距离?
解:meykey:根号2。 4-x=4-x2
3、有一个题目觉得很有意思,就是问y=xx+1和y=x-1的图是下列哪一个?
比较简单。选的是D。
4、一直线在X轴截距为a,Y轴上截距为b,问斜率是多少。
现在已经是新GRE时代了,新GRE数学难度会随第一个section的准确率而相应的提高难度,这是众所周知的事情了。那么新GRE数学疑难问题解答思路有哪些?怎样解答新GRE数学中的疑难问题呢?请看下文的解析。
1.从2 3 4 5 6 7 8 9中取数字组成三位数号码,assign to 330 employee, 数字不重复, 问多少号码unassigned?
解:P==336
336-330=6
2.一个工作W,X做要比Y做少两天,X,Y一起做4/3W要3天,求X单独做2W要几天?
解:令W/X=x,W/Y=y,则x+2=y
/=3
两式连立化去y,即可解得x
3.=2^x3^y5^z 代表的是n的函数,x,y,z,都是positive integer, and x,y,z,分别代表n的百位,十位和个位,问如果f=9f,m-v=?
解:因为f=9f,所以两数百位个位都相同,令a为m的十位,b为n的十位则可知,/=9
解得a-b=2
所以m-v=210=20
4.10的n次方减38所得数的digit sum 为350. n=?
解:9+=350
5.1到n是连续整数, 1到n 数的乘积能被990 整除, 问n 最少是?
解:990=11109,所以n不能小于11
以上便是新GRE数学常见疑难解答思路的几种方法,希望考生在看完之后能更好的灵活运用!
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