Provide an appropriate response.Use the formal definitions of limits to prove 
= ?
What will be an ideal response?
Given B > 0, we want to find ? > 0 such that 0 < 
< ? implies 
> B.
Now, 
> B if and only if 
< 
.
Thus, choosing ? = 2/B (or any smaller positive number), we see that
< ? implies 
> 
? B.
Therefore, by definition 
= ?
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