作业帮lim x(x+2)/x^2 (x→oo)lim 1/sin(x-2) (x→2)
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lim x(x+2)/x^2 (x→oo)lim 1/sin(x-2) (x→2)
lim x(x+2)/x^2 (x→oo)
lim 1/sin(x-2) (x→2)
lim x(x+2)/x^2 (x→oo)lim 1/sin(x-2) (x→2)
lim x(x+2)/x^2
=lim (x+2)/x
=lim(1+2/x)=1
2 sin(x-2)趋于0
lim1/sin(x-2)=无穷,极限不存在
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