大学数学极限?
4个回答
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(1)
lim(x->2) (x^2+5)/(x-3)
=(4+5)/(2-3)
=-9
(2)
lim(x->-2) (x^2-4)/(x+2)
=lim(x->-2) (x-2)(x+2)/(x+2)
=lim(x->-2) (x-2)
=-2-2
=-4
lim(x->2) (x^2+5)/(x-3)
=(4+5)/(2-3)
=-9
(2)
lim(x->-2) (x^2-4)/(x+2)
=lim(x->-2) (x-2)(x+2)/(x+2)
=lim(x->-2) (x-2)
=-2-2
=-4
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