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高等数学问题，求过程。
我有更好的答案
分子约等于 3x + x^2 ，分母约等于 5x ，然后分子、分母同除以 x ，得极限 = (3+0) / 5 = 3/5 。
第一题不太对啊
答案应该是2。可是过程我不会算
16/4 = 4 ，没错
第一题的分母应该还有一个平方
中学高级教师
p>等价无穷小公式，自己变换。
图片上有条件
不是带加减的不能直接代换吗
不好意思，加减是不可以的
那应该怎么算啊，给个过程吧
不会做😂
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