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当x>0且x≠1时, 当x>0时, 当x≥2时,x+的最小值为2 当0<x≤2时,x-无最大值
xf(x2) -xf(x2) 2xf(x2) -2xf(x2)
2(1-x2)2+C -2(1-x2)2+C
[-2,-1] [-1,1] [1,2] [2,3]
a(x)与β(x)是等价无穷小 a(x)与β(x)是高价无穷小 a(x)是β(x)的低阶无穷小 a(x)与β(x)是同阶无穷小但不是等价无穷小
x2-11x+30=0 x2+11x+30=0 x2+11x-30=0 x2-11x-30=0
E^*Sin(30*3.14/180)*2*X/X+Y*Log(X) Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X) Exp(X)*Sin(30*3.14/180)*2*x/(x+y)*Log(x) Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)
E^*Sin(30*3.14/180)*2*X/X+Y*Log(X) Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X) Exp(x)*Sin(30*3.14/180)*2*x/(x+y)*Log(x) Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)
α(x)与β(z)是等价无穷小 α(x)与β(x)是高价无穷小 α(x)是β(z)的低价无穷小 α(x)与β(x)是同价无穷小但不是等价无穷小
E^*Sin(30*3.14/180)*2*X/X+Y*Log(X) Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X) Exp(X)*Sin(30*3.14/180)*2*x/(x+y)*Log(x) Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(x)
E^*Sin(30*3.14/180)*2*X/X+Y*Log(X) Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X) Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Log(X) Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)