Compute Limits Homework: a & b

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SUMMARY

The forum discussion focuses on computing limits for two specific mathematical expressions as n approaches infinity. For part (a), the limit evaluates to 0 after applying the appropriate expansions and simplifications. For part (b), the limit also converges to 0 using similar techniques. The key method discussed involves dividing by n² and utilizing expansions for square root expressions.

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Homework Statement



Compute the limits:

a) \lim_{n \rightarrow \infty} n(2\sqrt{n^2 - n + 2} - 3\sqrt{n^2 + 1} + \sqrt{n^2 + 2n}),

b) \lim_{n \rightarrow \infty} n(n + 4\sqrt{n^2 + n} - 2\sqrt{n^2 - n} - 3\sqrt{n^2 + 2n}).



The Attempt at a Solution


Well, dividing by n^2 leads to nowhere as I still get \frac{0}{0}. I didn't figure out a good way to use squeeze theorem here neither. So, I'm stuck.
 
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hi aid! :smile:

yes, divide by n2, then use an expansion for everything of the form √(1 + something) :wink:
 

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