SAT数学Problem Solving练习题(42)

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摘要:下面是小站SAT频道为大家整理了SAT数学Problem Solving练习题(42),供考生们参考,以下是详细内容。

以下是小站SAT频道为大家整理了SAT数学Problem Solving练习题(42),供考生们参考,以下是详细内容。


Question 42: If f(x) = |x| and g(x) = x2, how many solutions has f(x) = g(x)?

(a) 1

(b) 2

(c) 3

(d) 4

(e) The equations does not have real solutions.

Answer: The simplest way to solve this problem is to draw the 2 functions in the x, y plane.

SAT数学Problem Solving练习题(5)

We find that the 2 functions intersect in 3 locations, for x = -1, 0 and 1.


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