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Let x= 0.9999999..... ....1
then
10x= 9.999999999..... .....2
subtracting equation 1 by 2 we get
9x= 9
x= 1
then
10x= 9.999999999..... .....2
subtracting equation 1 by 2 we get
9x= 9
x= 1
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