Ответ:

lim6x^2-x+2/3x^2-2x+1=

lim6x^2/x^2-x/x/^2+2/x^2/3x^2/x^2-2x/x^2+1/x^2=6/3=2

2) каждый член делим на х^2

limx^2/x^2+7x/x^2+10/x^2/2x^2/x^2+9x/x^2+10/x^2=1/2