3. Let f: [a, b] → R. Suppose f is continuous at c € [a, b] and f(c) > 0. Prove that there exists >0 such that f(x) > 0 for any ze [a, b] with |x-c|

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A: Solution :-

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Q: 5. Let f : R → R be defined by f(x) = { 0 if r € Q, x2 otherwise. Prove that f is continuous at 0…

A: Here we prove the problem using the definition of continuity and a theorem.

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Q: 3. Let f, g to be two continuous functions on [a, b] and f(a) ≥ g(a), f(b) ≤ g(b). Prove that Exo €…

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Q: 3. Let f, g : [a, b] → [c, d] be cotinuous functions. Suppose that f is surjective. Prove that there…

A: We will use of intermediate value theorem to proof this

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Q: 3. Assume f: ZR and prove that f is uniformly continuous.

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A: Consider the given information.

Q: 15) Prove that if ffx) is continuous at x=0 then so is V f(x) provided that fix) zo for all x in the…

A: Step 1: Step 2: Step 3: Step 4:

Q: 3. Let f be entire. Suppose that there exist a EC and > 0 such that f(z) & Da, e) for all z E C.…

A: Since f is entire, it is holomorphic on the entire complex plane. Now, we know that f has a root in…

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