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Mathematics 18 Online
OpenStudy (anonymous):

What is 0.14 repeating as a ratio of two integers?

OpenStudy (unklerhaukus):

\[0.141414...=0.\dot1\dot4\] \[x=0.\dot1\dot4\\100x=14.\dot1\dot4\\100x-x=14.\dot1\dot4-0.\dot1\dot4\\99x=14\]

OpenStudy (anonymous):

wait? you can solve for infinite decimals with algebra? omg, that is amazing!

OpenStudy (unklerhaukus):

with this method you can prove \[0.999...=0.\dot9=1\]

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