calculus

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Can someone please help explain these two questions for me. For the first one my guess is that it is -infinity and for the second question it would be at 0.

Find the limit.

lim_(x->infinity) (x^(3) - 2x + 3)/(4 - 5 x^(2))


Locate the discontinuities of the function.
y = 2/(1 + e^(1\/x))

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