3. Prove that the product of two consecutive positive integers is divisible by 2.
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Answer:
divisible by 2
Step-by-step explanation:
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Step-by-step explanation:
To prove: product of two consicutive positice integer is divisible by two.
Proof:
Any even number is divisible by two.
Suppose the two consecutives numbers are (x) and (x + 1)
so the product of consecutives numbers = (x)(x + 1)
(i) for an even number
Let x = 2k,
product = (2k)(2k + 1)
From the above equation it is clear that the product is
divisible by two.
(ii) for an odd number
Let x = 2k + 1
product = (2k + 1){(2k + 1) + 1}
= (2k + 1)(2k + 2)
= 2(2k^2+3k+1)
From the above equation it is clwar that it is divisible
by two.
Hence proved.
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