lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷
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lim(3x-5)/(x^3sin(1/x^2))其中x趋于无穷lim(3x-5)/(x^3sin(1/x^2))其中x趋于无穷lim(3x-5)/(x^3sin(1/x^2))其中x趋于无穷求极限x
lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷
lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷
lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷
求极限x→∞lim(3x-5)/[x³sin(1/x²)]
原式=x→∞lim[(3x-5)/x]=x→∞lim[3-(5/x)]=3
【当x→∞时1/x²→0,故sin(1/x²)∽1/x²】
令t=1/x得
=lim (3t^2-5t^3)/sin(t^2)
=lim (3-5t)t^2/t^2
=3
lim x->0 (sin x-tan x)/sin (x^3)
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