Question

va roooooooooog muuult​

Answer 1

Răspuns:

Explicație pas cu pas:

i)

abc/999 + cab/999 + bca/999 = (abc + cab + bca)/999

abc + cab + bca = 100a + 10b + c + 100c + 10a + b + 100b + 10c + a

= 111a + 111b + 111c = 111(a + b + c)

fractia devine

111(a + b + c)/999 = (a + b + c)/9

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j)

(5a + 3 - 3a + 1)/(3a + 6) = (2a + 4)/(3a + 6) = 2(a + 2)/3(a + 2) = 2/3