Re: [微積 求解惑derivative of parametric equation
※ 引述《baseballcell (蘿蔔)》之銘言:
: 求解惑
: parametric curve x=f(t),y=g(t)
: where y is also a differentiabl function of x???
: then dy/dx=(dy/dt)/(dx/dt)
: 怎麼說y是x的函數????
: 當t無法消去護者無法表示成t=h(x)時,y仍視為x的函數???
x=f(t),y=g(t)表示參數曲線沒問題
問題是這條曲線步一定能以[y=h(x])或[h(x,y)=0]隱含數的形式表現
怎麼說y is a function of x???
例如: =(1+sint)cost,y=t+exp(t)
此兩條參數曲線如何表示in terms of x and y???
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