x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 11:32:16
x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.
xRN@~6p.<'/JxBTh (`P~4 1EޠOx īvwvfoY%Yx6x#'Օ@\Vc+IuE8U<Aujj3kIV-5z|~\#(0=#is6A.+q&Y]h&8ƅsW%euK?ׁeq=xĪaQ2@Q4I#!.{iRr)9=gl]h?<СaRVg2F]Sn7 Vġ,H]b1og1)>Fៃ8=eYHP;Hd'݂li9D-9]ױłD(Uqj蚨\@@f)9vK-t@:]F;*

x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.
x=a(θ-sinθ) y=a(1-cosθ)
x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.化解的目的在哪里,这样化解是为了得到什么.

x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d(dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的.
高等数学上册(同济版),第二章里有 追问:童鞋 .我上面写了步骤的.就是问那样化解撒意思.回答:θ自变量换成是X,就必须要求dx/dθ,因为 二阶导数 是y对x的,不是对θ,所以要代换掉