解lim/(x→0 )sin2x/x
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解lim/(x→0 )sin2x/x
![解lim/(x→0 )sin2x/x](/uploads/image/z/20070339-51-9.jpg?t=%E8%A7%A3lim%EF%BC%8F%EF%BC%88x%E2%86%920+%EF%BC%89sin2x%EF%BC%8Fx)
lim/(x→0 )sin2x/x=lim/(x→0 )2cos2x=2
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