Comparing the real (integer part) of a number.

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Homework Help Overview

The discussion revolves around comparing the real integer part of the sum of two real numbers, specifically evaluating the relationship between E(x+y) and E(x)+E(y), where E() denotes the integer part function.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the need to consider different cases based on the signs of x and y, with one participant providing an example to illustrate a specific case where both numbers are positive. Others are seeking clarification and proof for the general case.

Discussion Status

Some participants have provided references to external resources that may aid in understanding the concepts involved. There is an indication that one participant has formulated a proof based on the information gathered, but the overall discussion remains open for further exploration and validation of ideas.

Contextual Notes

Participants are navigating the complexities of the integer part function and its properties, with an emphasis on case distinctions based on the values of x and y. There is no consensus on a definitive proof yet, and the exploration of different scenarios is ongoing.

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Homework Statement



Compare between E(x+y) and E(x)+E(y) for every real number x and y.

E() refers to the real integer part of the number.


The Attempt at a Solution



Well I know that we have to split it up into 3 cases. One for which both are positive, both negative, and one of them is negative. For example I know when we have x and y greater than 0 we get E(x+y)≥E(x)+E(y) because let's take x=1.5 and y=1.6 then E(1.5+1.6)= 3 and
E(1.5)+E(1.6)= 2. Can anyone help me come up with a proof for this?
 
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Anyone have any ideas.
 
Alright Thank You I came up with a proof from what i read on wiki.
 

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