请看我之前的回答.思路是一样的.http://zhidao.baidu.com/question/553890148?&oldq=1
y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|+50n的最
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y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|的最小值为
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1X1+2X2+3X3+4X4+5X5.+98X98+99X99+100X100=?
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1x1+0x1+2x2+1x2+3x3+2x3+4x4+3x4……99x99+98x99+100x100+99x100
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1/2X3X4X5+1/3X4X5X6+1/4X5X6X7.1/97X98X99X100=?
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1 1 1 1 1 ——+——+——+——+```````` —— 2X3 3X4 4X5 5X6 99X100
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1/1X2+1/3X4+1/5X6+……+1/99X100=?
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1x1一2x2十3x3一4x4十5x5…十99x99一100x100
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3x(1x2+2x3+3x4+……+99x100)= (A)97x98x99 (B)98x99x100 (C)99x 1
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1.当x=1时,x-2x+3x-4x+……+99x-100x的值为( ) A.50 B.-50 C.100 D.-100