设[tex=3.143x1.357]+E+EcJyneTJKRl0PxOQvtg==[/tex]在区间[tex=5.143x1.357]MGhe4qtW2ut/akUC/g3VDLecdNbiIi03YvEf54JJP0I=[/tex]上连续且不取负值，试用微元法推导：由曲线[tex=3.143x1.357]+E+EcJyneTJKRl0PxOQvtg==[/tex]，直线[tex=4.143x1.214]/G/Fdr7PMhEQsX1fLjD5vg==[/tex]及轴围成的平面图形绕[tex=0.5x1.0]iwXm0SwS+lfupyC0IyH8yQ==[/tex]轴旋转所成立体的体积为[tex=7.857x2.857]zvyQXCx7uAO0WExYzBsuYzOtRNp8Bxhx095aUd3QEamnlTd/eXGs2vp+heTGvK1m[/tex].
设[tex=3.143x1.357]+E+EcJyneTJKRl0PxOQvtg==[/tex]在区间[tex=5.143x1.357]MGhe4qtW2ut/akUC/g3VDLecdNbiIi03YvEf54JJP0I=[/tex]上连续且不取负值，试用微元法推导：由曲线[tex=3.143x1.357]+E+EcJyneTJKRl0PxOQvtg==[/tex]，直线[tex=4.143x1.214]/G/Fdr7PMhEQsX1fLjD5vg==[/tex]及轴围成的平面图形绕[tex=0.5x1.0]iwXm0SwS+lfupyC0IyH8yQ==[/tex]轴旋转所成立体的体积为[tex=7.857x2.857]zvyQXCx7uAO0WExYzBsuYzOtRNp8Bxhx095aUd3QEamnlTd/eXGs2vp+heTGvK1m[/tex].
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