f(α+x)=f(2α-x) 所以3sin(2x+2α-π/6)=3sin(4α-2x-π/6)=-3sin【2x-(4α-π/6)】
對(duì)一切實(shí)數(shù)x恒成立,因此2α-π/6+4α-π/6=π α=2π/9
已知f(x)=3sin(2x-π/6),若存在α∈[0,π/2],使f(α+x)=f(2α-x)對(duì)一切實(shí)數(shù)x恒成立,則α= . 要過(guò)程!
已知f(x)=3sin(2x-π/6),若存在α∈[0,π/2],使f(α+x)=f(2α-x)對(duì)一切實(shí)數(shù)x恒成立,則α= . 要過(guò)程!
數(shù)學(xué)人氣:673 ℃時(shí)間:2019-11-12 07:53:58
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