※ 引述《bitchdog (PEaCE)》之銘言：
: lim sin(x^2)
: x→0 _________
: x
sin(x^2)
lim ----------
x→0 x
sin(x^2)
= lim (x)(----------)
x→0 x^2
sin(x^2)
= (lim x)(lim ----------)
x→0 x→0 x^2
= (0)*(1) = 0
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