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after 2/3 there is vertical line what does it mean
plz tell then i will answer it
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Step-by-step explanation:
a and a + 1 are two consecutive integers then exactly one of them is divisible by 2, this means that the product is divisible by 2. thus
2 | a(a + 1)
a , a + 1 and a + 2 are three consecutive integers then exactly one of them is divisible by 3, this means that the product is divisible by 3. thus
3 | a(a + 1)(a + 2)
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