Răspuns:
Explicație pas cu pas:
1,1(6) = (116 - 11)/90 = 105/90 = 21/18 = 7/6
3,5 = 35/10 = 7/2
7/6 : 7/2 = 7/6*2/7 = 2/6 = 1/3
1/3 + 1 = 1/3 + 3/3 = 4/3
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1,(3) = (13 - 1)/9 = 12/9 = 4/3
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x = (4/3)^9 : (4/3)^7 = (4/3)^2 = `16/9
inversul lui x este 9/16
