How do you solve limits that go to infinity?

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hannahbannah

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Ok I can't solve these. I'm having a hard time.

lim (sqrt(16x^2+x)-4x)
x->infinity

lim (x+2/sqrt(4x^2+1))
x->infinity

I know you have to use the conjugates or w/e but what do I do after that. Steps would help thanks!
 
(edited: ted s is quite right on the first one)


For the second one this will simply -> infinity as the first term will only get bigger and the second term will only get smaller as x->infinity.
 
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