help with calculus - x approaching - infiniti?

beth

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find the limit:

1)

lim x^3 - 3x^2 + 3x - 10 / x^2 + 5
x-> -infiniti

not sure what to do when x is approaching negative infiniti

2) find the limit:

lim 3x + 2 / square root of [16x^2 + 5]
x->infiniti
 
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