What is if ?
It's all about the algebra, baby.
.
It's important to notice that because of the square, there are two different possible values for the limit.
Using the rules for limits of sums, limits of powers, and limits of x (we're throwing a lot of rules in here, aren't we?)
Now we raise each side to the 4th power to find
What's if ?
We can solve this one using our rules for products, powers, and roots:
Simplifying,
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