dy/dt=—x^2 dx/dt=-y^2 两式相减,得 d(x—y)/dt=(x—y)(x+y)设x+y=h(t),...
x的3次方除以x-1的完全平方的二阶导数和渐近线怎么求 答案 设f(x)=x^3/(x-1)^2=x+2+(3x-2)/(x-1)^2=x+2+3/(x-1)-2/(x-1)^2f'(x)=1-3/(x-1)^2+4/(x-1)^3f''(x)=6/(x-1)^3-12/(x-1)^4显然,当且仅当x=1时,分母=0,分子≠0,所以f(x)有唯一的垂直渐近线x=1...
dx/dy == a y^2 / (b x^2) - Wolfram|Alphawww.wolframalpha.com/input/?i=dx%2Fdy+...
f'(x)=1-3/(x-1)^2+4/(x-1)^3 f''(x)=6/(x-1)^3-12/(x-1)^4 显然,当且仅当x=1时,分母=0,分子≠0,所以f(x)有唯一的垂直渐近线x=1 lim[x->∞] f(x)=∞,没有水平渐近线 lim[x->∞] f(x)/x=lim[x->∞] 1+2/x+3/x(x-1)-2/x(x-1)^2=1 lim[x...
设f(x)=x^3/(x-1)^2=x+2+(3x-2)/(x-1)^2=x+2+3/(x-1)-2/(x-1)^2f'(x)=1-3/(x-1)^2+4/(x-1)^3f''(x)=6/(x-1)^3-12/(x-1)^4显然,当且仅当x=1时,分母=0,分子≠0,所以f(x)有唯一的垂直渐近线x=1lim[x->∞] f(x)=∞,没有... 解析看不懂?免费查看同类...