题目
单项选择题
Find the graph for the function [math: y=12(x+1)(x+2)(x−4)] y= \frac{1}{2} (x+1)(x+2)(x-4) .
选项
A.a.
B.b.
C.c.
D.d.
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标准答案
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思路分析
The task asks to find the graph for the function y = 12(x+1)(x+2)(x-4) and compares it to y = 1/2 (x+1)(x+2)(x-4).
First, note that both functions share the same zeros at x = -1, x = -2, and x = 4, since the zeros come from the factors (x+1), (x+2), and (x-4). This means every candidate graph should cross the x-axis at those three x-values (assuming the graph is drawn with those intercepts clearly visible).
Second, the two graphs have the same basic cubic shape (both have an odd degree with a positive leading coefficient). Thus, as x → ∞,......Login to view full explanation登录即可查看完整答案
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