Lim sin4x/2x = Lim2* sin4x/4x =2* Lim sin4x/4x =2*1 =2.
x→0----------------x→0------------------------x→0
* * * * * * *
Lim(x² -5x +6)/(x³ -27) =Lim(x -2)(x -3)/(x -3)(x²+3x+9)=Lim(x -2)/(x²+3x+9) =
x→3---------------------------x→3-----------------------------------x→3
=1/27.
* * * * * * *
Lim(x² -x -2)/(x² +x -6)=Lim(x -2)(x+1)/(x-2)(x +3) =Lim(x+1)/(x +3)=3/5.
x→2--------------------------x→2--------------------------x→2
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