求详细过程.拜托了
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a·b=-(coswx-sinwx)(coswx+sinwx)+√3sin(2wx)
=√3sin(2wx)-cos(2wx)
=2sin(2wx-π/6)
故:f(x)=2sin(2wx-π/6)+λ
关于x=π对称,即:2wπ-π/6=kπ+π/2,k∈Z
即:2w=k+1/2+1/6=k+2/3
即:w=k/2+1/3,k∈Z
w∈(1/2,1),当k=1时,w=5/6满足条件
1
故:f(x)=2sin(5x/3-π/6)+λ
最小正周期:2π/(5/3)=6π/5
2
函数点(π/4,0),即:2sin(5π/12-π/6)+λ
=2sin(π/4)+λ=√2+λ=0
即:λ=-√2
即:f(x)=2sin(5x/3-π/6)-√2
x∈[0,3π/5],故:5x/3-π/6∈[-π/6,5π/6]
故:sin(5x/3-π/6)∈[-1/2,1]
故:2sin(5x/3-π/6)-√2∈[-1-√2,2-√2]
=√3sin(2wx)-cos(2wx)
=2sin(2wx-π/6)
故:f(x)=2sin(2wx-π/6)+λ
关于x=π对称,即:2wπ-π/6=kπ+π/2,k∈Z
即:2w=k+1/2+1/6=k+2/3
即:w=k/2+1/3,k∈Z
w∈(1/2,1),当k=1时,w=5/6满足条件
1
故:f(x)=2sin(5x/3-π/6)+λ
最小正周期:2π/(5/3)=6π/5
2
函数点(π/4,0),即:2sin(5π/12-π/6)+λ
=2sin(π/4)+λ=√2+λ=0
即:λ=-√2
即:f(x)=2sin(5x/3-π/6)-√2
x∈[0,3π/5],故:5x/3-π/6∈[-π/6,5π/6]
故:sin(5x/3-π/6)∈[-1/2,1]
故:2sin(5x/3-π/6)-√2∈[-1-√2,2-√2]
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能拍给我吗
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不好意思啊!T_T我并不在家。
你勉强看看吧! 真是不好意思!对不起啦,
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