Is 0.999...=1 an Error in Math?

Raza

At first, when I saw this, I was deeply shocked and lost the believe that math is absolute. Like the thinking that if Math can prove it, it must exist and if it can't, it doesn't exist.

So is 0.99999...=1 illogical?

also, is it fair to say that 1.00=1?

Sorry if this question is already posted or it's in the wrong forum.

NoMoreExams

Do a google search on this and you will find a couple thousand links that you can read. Here's one: http://mathforum.org/library/drmath/view/55748.html

ialbrekht

0.99999(9) is 1
It's right and logical. Unfortunately, I don't remember the prove now, it was on the first grade in University.

cristo

This has been slogged out many times: there's no need for another discussion thread.

HallsofIvy

The real question, Raza, is do you know what 0.9999... means? If not, you certainly can't say that 0.9999...= 1 is an error! If you believe you do, what do you think 0.9999... means? The fact that you ask if 1.00= 1 makes me wonder.

Similar Threads for: Is 0.999...=1 an Error in Math?
Thread	Forum	Replies
Measurement error analyses, fitting min/max slopes to data with error bars.	Set Theory, Logic, Probability, Statistics	2
Error in math book? Please view this.	General Math	3
Using Differentials to find Error and Percent Error	Calculus & Beyond Homework	4
Pressure Problem (math error I think)	Introductory Physics Homework	7
Math CAD constant error	General Math	2

Raza	Is 0.999...=1 an Error in Math? Tweet At first, when I saw this, I was deeply shocked and lost the believe that math is absolute. Like the thinking that if Math can prove it, it must exist and if it can't, it doesn't exist. So is 0.99999...=1 illogical? also, is it fair to say that 1.00=1? Sorry if this question is already posted or it's in the wrong forum.

NoMoreExams	Do a google search on this and you will find a couple thousand links that you can read. Here's one: http://mathforum.org/library/drmath/view/55748.html

ialbrekht	0.99999(9) is 1 It's right and logical. Unfortunately, I don't remember the prove now, it was on the first grade in University.

cristo Mentor	Is 0.999...=1 an Error in Math? This has been slogged out many times: there's no need for another discussion thread.

HallsofIvy Recognitions: Gold Member Science Advisor Staff Emeritus	The real question, Raza, is do you know what 0.9999... means? If not, you certainly can't say that 0.9999...= 1 is an error! If you believe you do, what do you think 0.9999... means? The fact that you ask if 1.00= 1 makes me wonder.