已知函数f(x)=2sin^2(π/4x+π/4)1 把f(x)解析式化为f(x)=Asin(ωx+φ)+b的形式, 2 计算f(1)+f(2)+.+f(2012)的值 要过程
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![已知函数f(x)=2sin^2(π/4x+π/4)1 把f(x)解析式化为f(x)=Asin(ωx+φ)+b的形式, 2 计算f(1)+f(2)+.+f(2012)的值 要过程](/uploads/image/z/5614303-31-3.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3D2sin%5E2%EF%BC%88%CF%80%2F4x%2B%CF%80%2F4%EF%BC%891+%E6%8A%8Af%28x%29%E8%A7%A3%E6%9E%90%E5%BC%8F%E5%8C%96%E4%B8%BAf%28x%29%3DAsin%28%CF%89x%2B%CF%86%29%2Bb%E7%9A%84%E5%BD%A2%E5%BC%8F%2C+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2++%E8%AE%A1%E7%AE%97f%EF%BC%881%EF%BC%89%2Bf%EF%BC%882%EF%BC%89%2B.%2Bf%EF%BC%882012%EF%BC%89%E7%9A%84%E5%80%BC+++++++++++++++%E8%A6%81%E8%BF%87%E7%A8%8B)
已知函数f(x)=2sin^2(π/4x+π/4)1 把f(x)解析式化为f(x)=Asin(ωx+φ)+b的形式, 2 计算f(1)+f(2)+.+f(2012)的值 要过程
已知函数f(x)=2sin^2(π/4x+π/4)
1 把f(x)解析式化为f(x)=Asin(ωx+φ)+b的形式, 2 计算f(1)+f(2)+.+f(2012)的值 要过程
已知函数f(x)=2sin^2(π/4x+π/4)1 把f(x)解析式化为f(x)=Asin(ωx+φ)+b的形式, 2 计算f(1)+f(2)+.+f(2012)的值 要过程
f(x)=1-cos(πx/2+π/2)=1+sin(πx/2);
f(1)+f(2)+……+f(2012)
=2012+503[sin(π/2)+sin(π)+sin(3π/2)+sin(2π)]
=2012
f(x)=2[sin(π/4x)cos(π/4)+cos(π/4x)sin(π/4)]^2=[sin(π/4x)+cos(π/4x)]^2=1+sin(π/2x)
f(1)+f(2)+……+f(2012)=1+2+3+......+2012=2013*2012/2=2025078
注:每连续四个f(x)相加,三角函数部分均为0