lim(x趋向3)3/(x^2-6x+9)
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lim(x趋向3)3/(x^2-6x+9)lim(x趋向3)3/(x^2-6x+9)lim(x趋向3)3/(x^2-6x+9)分子为常数3,分母趋近于0(当x趋近于3时]所以,lim=无穷大〈为3/0
lim(x趋向3)3/(x^2-6x+9)
lim(x趋向3)3/(x^2-6x+9)
lim(x趋向3)3/(x^2-6x+9)
分子为常数3,分母趋近于0(当x趋近于3时]
所以,lim=无穷大
〈为3/0型〉
a/0型(a为常数且不等于0),极限值为∞
0/0或∞/∞型,用洛毕达法则(分子分母分别求导)
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