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问题: 最大值

解答:

(1) A=2, T=2π/ω=11π/12+π/12--->ω=2
  过(0,1)--->2sinφ=1--->φ=π/6--->f1(x)=2sin(2x+π/6)
(2) f2(x) = f1(x-π/4) = 2sin(2x-π/3)
  最大值=2,此时,2x-π/3=2kπ+π/2--->x∈{x|x=kπ+π/2,k∈Z}