Объяснение:
ab = 10a + b
ba = 10b + a
ab + ba = 10a + b + 10b + a = 11a + 11b = 11(a+b)
Доказано
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Объяснение:
ab = 10a + b
ba = 10b + a
ab + ba = 10a + b + 10b + a = 11a + 11b = 11(a+b)
Доказано