0,3(7) przedstaw w ułamku zwykłym.
pomóżcie, bo nie mogę ogarnąć :D
0,3(7) = 0,37777....=0,3+0,07777....= = cdn
0,7777 = x /*10
7,777... = 10x
7 + x = 10x
7 = 9x
cd =
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0,3(7) = 0,37777....=0,3+0,07777....= = cdn
0,7777 = x /*10
7,777... = 10x
7 + x = 10x
7 = 9x
cd =