Zapisz podane liczby w postaci ułamka zwykłego. Proszę o wyjaśnienie jak postępować po kolei. Proszę o ROZWIĄZANIE. :)
a) 3,012
b) 1, (9)
c) 10,2(33)
d) 2, (584)
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a).
b). 1,(9)=1,999.... = 1+0,999... = cdn
0,999.... = x /*10
9,999... = 10x
9+0,999... = 10x
9+x = 10x
9 = 9x
1 = x
cd = 1+1=2
c). 10,2(33) = 10,23333... = 10 + 0,2 + 0,03333... = 10 + 0,2 + 1/10 * 0,333... = cdn
0,333... = x /*10
3,333... = 10x
3 + 0,333... = 10x
3 + x = 10x
3 = 9x
x = 1/3
cd = 10 + 2/10 + 1/10*1/3 = 10 + 2/10 + 1/30 = 10 + 6/30 + 1/30 =10 i 7/30
d). 2,(584) = 2,584584... = 2 + 0,584584... = cdn
0,584... = x /*1000
584,584... = 1000x
584 + 0,584584... = 1000x
584 +x = 1000x
999x = 584
x=584/999
cd = 2 i 584/999
a) 3,012= 3012/1000
b) 1, (9)=2
c) 10,2(33)=1023/1000
d) 2, (584)=2584/1000