Lim(x趋向无穷)[(x^2-6x+8)/(x^2-5x+4)]?

问题描述:

Lim(x趋向无穷)[(x^2-6x+8)/(x^2-5x+4)]?

lim(x趋向无穷) (x^2-6x+8)/ (x^2-5x+4)=lim(x趋向无穷) (x-2)(x-4)/ ( (x-1)(x-4) )=lim(x趋向无穷) (x-2)/(x-1)=lim(x趋向无穷)(x-1)-1/(x-1)=lim(x趋向无穷){1-1/(x-1)}x趋向无穷时极限等于1...