2 years ago

Prove algebraically that 8.99999... = 9

Mathematics

2 answers:

kirill115 [55]2 years ago

8 0

1/9 = 0.111...
9/9 = 0.999... but also 1 because 9 divided by 9 is 1. Add 8 to both sided to get 8.9999... and 9

Jobisdone [24]2 years ago

5 0

You can't, it has been done before but there is a fault in the working because the 2 numbers are different. If you want to see a video of someone attempt it, I believe there is a video on the numberphile channel.

Hope this helps :)

You might be interested in

What is 5/8 divided by 5/12?

stiks02 [169]

$\frac{5}{8} \div \frac{5}{12} \\\\Switch\ to\ muliplication\ and\ find\ reciprocal\ of\ second\ fraction.\\\\ \frac{5}{8}\times \frac{12}{5} \\\\Multiply\ Across.\\\\5\times12=60\\8\times5=40\\\\ \frac{60}{40} \\\\Simplify\\\\ \frac{60}{40} \div20= \frac{3}{2} =1 \frac{1}{2}\ or\ 1.5$