lim x^3-1 / x-1

x->1

the answer is 3

lim 3-x / x^2-2x-8

x->4-

the answer is + infinit

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- Jan 1st 2008, 05:55 AMwuteverlimits
lim x^3-1 / x-1

x->1

the answer is 3

lim 3-x / x^2-2x-8

x->4-

the answer is + infinit - Jan 1st 2008, 05:58 AMwingless
$\displaystyle x^3-1 = (x-1)(x^2+x+1)$

$\displaystyle x^2-2x-8 = (x-4)(x+2)$

Try to solve them now. - Jan 1st 2008, 06:03 AMjanvdl