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14-03-2017
Mathematics

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Write an expression to represent the sum of three consecutive even numbers.

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14-03-2017

even numbers are reppresented as 2n where n is an even number
consecutive even numbers are 2 apart (2,4,6,8...)
so sum of 3 is

the numbers are
2n, 2n+2, 2n+4

so the sum is 2n+2n+2+2n+4=6n+6

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