函数y=2sin(2x+π/3)的一条对称轴和一个对称中心是
A.x=π/12,(-π/6.,0)
B.x=π/6,(π/12,0)
C.x=π/3,(π/3,0)
D.x=-π/12,(5/6π,0)
人气:370 ℃ 时间:2019-12-09 01:36:29
解答
对称轴:
2x+π/3=kπ+π/2
x=kπ/2+π/12,k=0,x=π/12
对称中心
2x+π/3=kπ+π
x=kπ/2-2π/3 k=1,x=-π/6
所以选A
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