已知函数f(x)=3sin(1/2-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图②求此函数的对称中心和对称轴已知函数f(x)=3sin(1/2x-π/4),x∈R①用五点作图法画出函数f(x)在
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![已知函数f(x)=3sin(1/2-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图②求此函数的对称中心和对称轴已知函数f(x)=3sin(1/2x-π/4),x∈R①用五点作图法画出函数f(x)在](/uploads/image/z/2623243-67-3.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D3sin%281%2F2-%CF%80%2F4%29%2Cx%E2%88%88R%E2%91%A0%E7%94%A8%E4%BA%94%E7%82%B9%E4%BD%9C%E5%9B%BE%E6%B3%95%E7%94%BB%E5%87%BA%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8%E9%95%BF%E5%BA%A6%E4%B8%BA%E4%B8%80%E4%B8%AA%E5%91%A8%E6%9C%9F%E7%9A%84%E9%97%AD%E5%8C%BA%E9%97%B4%E4%B8%8A%E7%9A%84%E7%AE%80%E5%9B%BE%E2%91%A1%E6%B1%82%E6%AD%A4%E5%87%BD%E6%95%B0%E7%9A%84%E5%AF%B9%E7%A7%B0%E4%B8%AD%E5%BF%83%E5%92%8C%E5%AF%B9%E7%A7%B0%E8%BD%B4%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D3sin%281%2F2x-%CF%80%2F4%29%2Cx%E2%88%88R%E2%91%A0%E7%94%A8%E4%BA%94%E7%82%B9%E4%BD%9C%E5%9B%BE%E6%B3%95%E7%94%BB%E5%87%BA%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8)
已知函数f(x)=3sin(1/2-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图②求此函数的对称中心和对称轴已知函数f(x)=3sin(1/2x-π/4),x∈R①用五点作图法画出函数f(x)在
已知函数f(x)=3sin(1/2-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图
②求此函数的对称中心和对称轴
已知函数f(x)=3sin(1/2x-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图②求此函数的对称中心和对称轴
已知函数f(x)=3sin(1/2-π/4),x∈R①用五点作图法画出函数f(x)在长度为一个周期的闭区间上的简图②求此函数的对称中心和对称轴已知函数f(x)=3sin(1/2x-π/4),x∈R①用五点作图法画出函数f(x)在
f(x)=3sin(1/2x-π/4)
1. 列表:
1/2x-π/4 0 π/2 π 3π/2 2π
x π/2 3π/2 5π/2 7π/2 9π/2
f(x) 0 3 0 -3 0
描点成图
2
由 1/2x-π/4=kπ+π/2 ==> 对称轴方程: x=2kπ+3π/2 k∈Z
由 1/2x-π/4=kπ ==>x=2kπ+π/2 对称中心(2kπ+π/2,0) k∈Z
没有x