y怎么变化没有吗?如果y比x小得多,那么y/x趋于零;
sin(y/x)=y/x(极限),那么原式=x^2*(y/x)^2=y^2
x趋向于无穷大,则limx^2sin^2(y/x)是多少?
x趋向于无穷大,则limx^2sin^2(y/x)是多少?
其他人气:886 ℃时间:2020-05-09 04:30:27
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