作业帮lim(x→2)(2x^2-5x+2)/(x^2-x-2)
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lim(x→2)(2x^2-5x+2)/(x^2-x-2)
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
lim(x→2)(2x^2-5x+2)/(x^2-x-2)
=lim(x→2)(2x-1)(x-2)/(x-2)(x+1)
=lim(x→2)(2x-1)/(x+1)
=3/2+1
=1
原式=lim(x→2)(2x-1)(x-2)/(x+1)(x-2)
=lim(x→2)(2x-1)/(x+1)
=3/3
=1
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