lim _(xarrow +infty )(sqrt ({x)^2+2x}-x);;
设(x)+(x)^2f(dfrac (1)(x))=dfrac ({x)^2+2x}(x+1) 求f(x)设
[题目]已知函数 (x-1)=(x)^2-2x, 则 f(x)= __
求:lim _(xarrow 0)dfrac (4{x)^3-2(x)^2+x}(3{x)^2+2x}-|||-__求:
((x)^2) D. (x)^2f((x)^3)
当x→0时,f(x)=e^-x^(2+2x^3)-1与g(x)=x^2比较是()A. f(x)是g(x)高阶的无穷小量B. f(x)是g(x)低阶的无穷小量C.
-x-|||-C.2x-|||-D. -2x
((X)_(1)+(X)_(2)+(X)_(3))/3 b.X1-|||-c. ((X)_(1)+(X)_(2))/2 d. (2(X)_(1)+(X)_(2)
化简表达式dfrac ({x)^3-3(x)^2+2x}({x)^2-4}化简表达式
×14.设函数 =(x)^2+2x , dy/dx=【 】.-|||-