3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__

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3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__

3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__

3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
（n+2)*(n+3)*(n+4)

3,4,5,6,7, 3,4,5,6,7 3+4+5+6+7 3 4 5 6 7 3 4 5 6 7 . 3,4,5,6,7, 3,4,5,6,7, 3,4,5,6,7 4,5,6,7, 4 5 6 7 4 5 6 7 4、5、6、7, 4 5 6 7 4,5,6,7 4,5,6,7, 4,5,6,7 4,5,6,7 4,5,6,7