∫(sinx/x)dx 在[π/4,π/2]的定积分估值.
问题描述:
∫(sinx/x)dx 在[π/4,π/2]的定积分估值.
答
f(x) = sinx / x ,f '(x) = (x cosx - sinx ) / x² = cosx ( x - tanx) / x²x∈(π/4,π/2),f '(x)
∫(sinx/x)dx 在[π/4,π/2]的定积分估值.
f(x) = sinx / x ,f '(x) = (x cosx - sinx ) / x² = cosx ( x - tanx) / x²x∈(π/4,π/2),f '(x)