Odpowiedź:
x=0,777777777..... x= 0,024242424....
10x=7,777.... 10x= 0,242424....
10x-x=7 100x=2,4242424....
9x=7 1000x= 24,242424....
x= 7/9 1000x-10x=24
990x=24
x= 24/990= 8/330=4/165
x=0,666666666.... x=0,0454545......
10x=6,66666.... 10x=0,454545...
10x-x=6 100x= 4,5454545...
9x=6 1000x= 45,454545...
x=2/3 1000x-10x=45
x= 45/990= 1/22
Szczegółowe wyjaśnienie:
-0,(7)=-7/9 0,0(24)=4/165
0,(6)=2/3 -0,0(45)=-1/22
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Odpowiedź:
x=0,777777777..... x= 0,024242424....
10x=7,777.... 10x= 0,242424....
10x-x=7 100x=2,4242424....
9x=7 1000x= 24,242424....
x= 7/9 1000x-10x=24
990x=24
x= 24/990= 8/330=4/165
x=0,666666666.... x=0,0454545......
10x=6,66666.... 10x=0,454545...
10x-x=6 100x= 4,5454545...
9x=6 1000x= 45,454545...
x=2/3 1000x-10x=45
x= 45/990= 1/22
Szczegółowe wyjaśnienie:
-0,(7)=-7/9 0,0(24)=4/165
0,(6)=2/3 -0,0(45)=-1/22