... 222203sin sin19 19 22422 22322xxxxx→=− + →− + =⎛⎞ ⎛ ⎞⎜⎟ ⎜ ⎟⎝⎠ ⎝ ⎠ Ví dụ 4: Tính ()2 212 01lim , lim 1 sin1xxxxxxx→∞ →⎛⎞−+⎜⎟+⎝⎠ Giải: 222 212 .2 21- 222x1 21 e 11 xxxxxxx⎛⎞⎛⎞+−−⎜⎟⎜⎟⎜⎟⎜⎟+⎝⎠⎝⎠→∞⎛⎞−⎛⎞=− ... ∀∈ [] )1, 1 (11 &apos ;1, 1arcsin2−∈∀−=−∈∀= xxyxxy [] )1, 1 (11 &apos ;1, 1arccos2−∈∀−−=−∈∀= xxyxxy 21 ... Tìm 11 lim ,21lim ,221lim223222−++++−−+∞→∞→∞→xxxxxxxxxxx Giải: 212 lim221lim2222==−−+∞→∞→xxxxxxx 01limlim21lim3232===+++∞→∞→∞→xxxxxxxxx 1lim11lim2222==−+∞→∞→xxxxxx...