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2024-12-12 22:08:43
Ư(15)={−1;-3;-5;1;3;5;-15;15}.
2024-12-01 20:20:39
( x - 3 )+( x - 2 )+( x - 1 )+...+ 9 + 10 = 0x - 3 + x - 2 + x - 1 +...+ 9 + 10 = 0 ( x + x + x )+(- 3 + - 2 + - 1 + ... + 9 + 10 )= 03x +(- 3 + - 2 + - 1 + 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 ) = 03x + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 03x + 49 = 03x =- 49x = ( - 49 ): 3x =- 16 , 3 .