Răspuns:
Explicație pas cu pas:
2 3/4 = 11/4
2,25 = 225/100 = 9/4
3,(6) = (36 - 3)/9 = 33/9 = 11/3
1,0(6) = (106 - 10)/90 = 96/90 = 32/30 = 16/15
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(11/4*9/4)/(11/3) = (99/16)/(11/3) = 99/16*3/11 = 27/16
2 - 27/16 = 32/16 - 27/16 = 5/16
(5/16) : 1/(16/15) = 5/16 : 15/16 = 5/16 * 16/15 = 5/15 = 1/3
a = 1/3
inversul lui a = 1/a = 3, numar natural
