3. Let f(x) = re* sin(1/a) + a if a #0 (a) Prove if r E (-1,0) U (0, 1) then f(x)- |< e²]r]. (b) Prove by using the definition of a limit that lim f(r) = a.

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A: it is true

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A: Topic:- limits and function

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A: As per the guidelines I am supposed to solve only three subparts of the given problems.

Q: Find the limits

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