无位
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x从6-〉14对应半个周期(pai),所以w=pai/8
而x = 14时,y 达到峰值,14pai/8+ψ = pai/2,ψ = 5pai/4
1年前
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红柴胡
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答案是3π/4,而且我要是将上述值带入后的计算过程。。。。
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无位
y = Asin(ωx+ψ)+b
y(6) = Asin(ω6+ψ)+b = 10
y(14) = Asin(ω14+ψ)+b = 30
y(10) = Asin(ω10+ψ)+b = 20
ω10+ψ = 0
ω6+ψ = -π/2
ω14+ψ = π/2
ω = π/8
ψ = -5π/4 = -5π/4 + 2π = 3π/4