gre数学真题几何分享

2022-12-05 20:03:04 来源：网络 作者：朗阁

QuantityA:Thenumberofintegersolutionsoftheequation3×^25x-2=0QuantityB:1AQuantityBisgreaterQuantityBisgreater

gre数学真题

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Quantity A   Quantity B

X        У

A. Quantity A is greater

B. Quantity B is greater

C. The two quantities are equal

D. The relationship cannot be determined from the information given.

Quantity A:

The number of integer solutions of the equation

3×^2+5x-2 = 0

Quantity B: 1

A. Quantity A is greater

B. Quantity B is greater

C. The two quantities are equal

D. The relationship cannot be determined from the information given

真题01思路：

注意，几何图形不一定按比例绘制!!!

因此，由于题干中没有告诉我们直线是否平行，我们无法判断×与y的大小。

正确答案：D

真题02思路：

3×^2+5x-2 = 0

(3x-1)(x+2)=0

X=1/3 or X=-2

虽然这个方程有2个解，但数量A对应的是这个

方程“整数”的解的个数!!!

这个方程的整数解只有“-2”这一种情况，所以数量A为1.与数量B相等。

正确答案：C

ABCE is a square, and BCDE is a parallelogram  

Quantity A: The area of square ABCE

Quantity B: The area of parallelogram

BCDE

A. Quantity A is greater.

B. Quantity B is greater.

C. The two quantities are equal

D. The relationship cannot be determined

from the information given.

参考答案：C

3.The figure above shows the graph of a function f, defined by f(x)=|2x|+4 for all numbers x. For which of the following functions g defined for all numbers × does the graph of g intersect the graph of f?

A. g(x) ×-2

B. g(x) × 3

C. g(x) 2x -2

D. g(x) 2x 3

E. g(x) 3x – 2

4. In some cultures the essence of magic is its traditional integrity; it can be efficient only if it has been ------- without loss from primeval times to the present practitioner.

A, conventionalized

B, realized

C, transmitted

D, manipulated

E, aggrandized

magic：n.魔术，法术，巫术

integrity:n.1.正真，廉正，诚实 ，诚恳 2-完整，完全 3.完善，健全

primeval：a.原始的，早期的，远古的

efficient: a.1.效率高的，有能力的，能胜任的

2.直接产生效果的，有效的，生效的

conventionalize：a.使符合习俗，使惯例化，按传统手法表现

aggrandize： v.扩大…权势，*…地位，增进，扩充

在某些文化中,巫术的本质在于其传统的完整性：只有当它被完好无损地从远古时期传递到当今术士的手中，它方能显得卓有成效。