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The Official Student Publication of University of the Philippines- College of Management, Iloilo City

1 = 0.999999….

by: Jun Bustamante

This is what i discovered 5 years ago.

let x = 0.9999…

(1) x = 0.9999… – given
(2) 10x = 9.9999… – multiply both sides of (1) by 10
(3) 9x = 9 – subtract (1) from (2)
(4) x = 1 – divide both sides of (3) by 9
(5) 1 = 0.9999… – substitute x with (1)

To all mathematics enthusiast, hope you have read this and share this with others.

Filed under: Feature

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