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CIE 9709 2023 June Paper 11 Q7

A Level / CIE / P1

CIE 9709 2023 June Paper 11 Paper · Question 7

题目

Problem

A curve has equation y=2+3sin12xy=2+3\sin\frac{1}{2}x for 0x4π0\leq x\leq 4\pi.

(a) State greatest and least values of yy.

[2]

(b) Sketch the curve.

[2]

(c) State the number of solutions of the equation

2+3sin12x=52x2+3\sin\frac{1}{2}x=5-2x

for 0x4π0\leq x\leq 4\pi.

[1]
题目中文翻译

一条曲线的方程为 y=2+3sin12xy=2+3\sin\frac{1}{2}x,其中 0x4π0\leq x\leq 4\pi

(a) 写出 yy 的最大值和最小值。

(b) 画出该曲线的草图。

(c) 写出方程

2+3sin12x=52x2+3\sin\frac{1}{2}x=5-2x

0x4π0\leq x\leq 4\pi 范围内的解的个数。

解答