liczby x=0,8(6) i y=(1,(2) zapisz jako ułamek zwykły i oblicz.
1/y*x^2
10x = 8,6666666...
1x = 0,8666666...
10x-x = 8,666666...-0,86666666
9x = 7,8
x= 7,8/9
x = 78/90
x= 13/15
10y = 12,222222....
y=1,22222222...
9y=11
y=11/9
1/((11/9)*(13/15))^2
1/(143/135)^2
1/(20449/18225)
18225/20449
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10x = 8,6666666...
1x = 0,8666666...
10x-x = 8,666666...-0,86666666
9x = 7,8
x= 7,8/9
x = 78/90
x= 13/15
10y = 12,222222....
y=1,22222222...
9y=11
y=11/9
1/((11/9)*(13/15))^2
1/(143/135)^2
1/(20449/18225)
18225/20449