大学极限题以下4题,(1)(2) (3)只需要给个答案,(4)给个做法(1)lim(x->3)(x^2-9)/(x-3)(2)lim(x->3)(x^2-2)/(x-3)(3)lim(x->2)(1/(x-2))-(4/(x^2-4))(4)lim(x->0)(xsin(1/x)

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大学极限题以下4题,(1)(2)(3)只需要给个答案,(4)给个做法(1)lim(x->3)(x^2-9)/(x-3)(2)lim(x->3)(x^2-2)/(x-3)(3)lim(x->2)(1/(

大学极限题以下4题,(1)(2) (3)只需要给个答案,(4)给个做法(1)lim(x->3)(x^2-9)/(x-3)(2)lim(x->3)(x^2-2)/(x-3)(3)lim(x->2)(1/(x-2))-(4/(x^2-4))(4)lim(x->0)(xsin(1/x)
大学极限题
以下4题,(1)(2) (3)只需要给个答案,(4)给个做法
(1)lim(x->3)(x^2-9)/(x-3)
(2)lim(x->3)(x^2-2)/(x-3)
(3)lim(x->2)(1/(x-2))-(4/(x^2-4))
(4)lim(x->0)(xsin(1/x)

大学极限题以下4题,(1)(2) (3)只需要给个答案,(4)给个做法(1)lim(x->3)(x^2-9)/(x-3)(2)lim(x->3)(x^2-2)/(x-3)(3)lim(x->2)(1/(x-2))-(4/(x^2-4))(4)lim(x->0)(xsin(1/x)
(1) 6 .(2) 无穷 (3)1/4
(4)=0 由于无穷小量×有界量仍是无穷小量