如题所述
≈2.00167解析:y=x^(1/3)y'=(1/3)x^(1/3-1)d=(1/3)x^(-2/3)dy=(1/3)x^(-2/3)dx≈(1/3)8^(-2/3)×0.02=(1/3)×(1/4)×0.02≈0.00167³√8.02≈³√8+Δy≈2.00167