is 0.9999999 = 1 true?

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im not good at maths myself but when i put that value in, its outcome was 1, literally.
 
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Yes, 0.9999999 is equal to 1 in mathematics, and this is a proven fact.

One way to see this is to consider the following mathematical equation:

1/3 = 0.333333...

Multiplying both sides by 3 gives:

1 = 0.999999...

Therefore, we can say that 0.9999999 is equivalent to 1, and the two numbers can be used interchangeably in most mathematical contexts.
 
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very nearly but not quite" 1
 
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if it by nhau thì has been many second on this world instead
 
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x = 0.999999
10x = 9.9999999
10x-x = 9.9999999 - 0.99999999
9x = 9
x = 1
0.9999999 = 1
so it should be true right?
Your calculation is completely incorrect.

If x = 0.999999

10x = 0.99999
^ Notice how there is now five "9" in the decimal value instead of the six "9" we started with

10x-x = 9.99999 - 0.999999

9x = 8.999991

x is still = 0.999999

As I have appropriately proven above, your assumption of 0.999999 being = 1 is not true and was based on an incorrect calculation.
 
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The error in this is that in the step where you subtract 0.999999 from 9.9999999, you are assuming that the digits after the decimal point cancel out, leaving only the integer part.
if you would take definite value x=0.999999
10x will be 9.99999 not 9.9999999
the more 9's we take at the end, the more we get closer to the number 1 but never will we reach it
0.999....... will never be equal to 1

TLDR: NO
 
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