Continuety of sum of functions

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Homework Help Overview

The discussion revolves around the continuity of the sum of functions, specifically examining scenarios where one or both functions may not be continuous at a point X0. The original poster poses questions regarding the conditions under which the sum f(x) + g(x) remains continuous or not.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the implications of continuity for the sum of functions under various conditions, questioning whether the continuity of one function affects the overall continuity of their sum. Suggestions include constructing counterexamples to clarify the conditions.

Discussion Status

Some participants have offered guidance on constructing counterexamples to test the original poster's premises. There is an acknowledgment of differing views on whether proof is necessary, with at least one participant asserting that one of the posed questions is false based on their example.

Contextual Notes

There is an indication that the original poster may be seeking examples to support their claims, and some participants question the requirement of formal proofs in this context.

transgalactic
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A.does f(x) +g(x) continues in X0 when
f(x) continues in X0 but g(x) doesnt?

B.does f(x) +g(x) continues in X0 when both
f(x) and g(x) are not continues in X0?

prove and give exmple to support your answer

??
 
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If you're uncertain whether or not each function is continuous, try to constuct a counter example satisying the initial premises. After that, prove whatever result you obtained.
 
For b) consider functions that have discont. but for example sum to be some constant.
 
Last edited:
i don't know how to prove such things
??
 
Are you sure you are supposed to prove them? b) is false using the example I gave so come up with a counterexample using the logic that I told you
 

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