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Solutia reala a ecuatiei 0,(3)[tex] x^{2} [/tex]=[tex] \frac{27}{256} [/tex] este egala cu ..?

Răspuns :

0,(3)=1/3
[tex] \frac{ x^{2} }{3} = \frac{27}{256}     x^{2} = \frac{81}{256}           x= \frac{9}{16} [/tex]
0.(3)=1/3
x la patrat /3=27/256
x la patrat*256=27*3
x la patrat=27*3/256
x la patrat=81/256
x=9/16
x=0.56