Calculus Volume 3 · 免费预览

参数曲线的微积分

对参数定义的曲线进行求导和积分,可以把斜率、弧长和表面积转化为关于参数的积分;其中利用链式法则求斜率,利用速率求弧长。

1. Slope from the parameter

Slope from the parameter

2. Higher derivatives and tangent lines

Higher derivatives and tangent lines

3. Arc length along a parametric curve

Arc length along a parametric curve

4. Surfaces of revolution

Surfaces of revolution

5. Slope of a parametric curve

For x(t) = t squared and y(t) = 2t, what is the slope dy/dx at the parameter value t = 2?

6. Locating a vertical tangent

For a parametric curve, at which parameter values does the curve have a vertical tangent line?

7. Arc length integrand

Which integrand gives the arc length of a parametric curve over the interval from a to b?

8. Arc length of a straight parametrization

For x = 3t and y = 4t on the interval from 0 to 2, what is the arc length?

9. Surface area by revolution

Which expression gives the area of the surface formed by revolving a parametric curve about the x axis?

10. Parametric versus Cartesian setup

For a curve given parametrically, which computation finds the tangent line's slope at a point?

11. Slope at a parameter value

For x(t) = t squared and y(t) = 2t, what is the slope dy/dx at t = 2? Give a decimal number.

12. A second derivative

For x(t) = t squared and y(t) = t cubed, what is the second derivative of y with respect to x at t = 1? Give a decimal number.

13. Length of a straight path

For x = 3t and y = 4t on the interval from 0 to 2, what is the arc length? Give a number.

14. Slope with a linear coordinate

For x(t) = t and y(t) = t squared, what is the slope dy/dx at t = 3? Give a number.

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