2 1/2x5+4 1/5x8+6 1/8x11+...+100 1/149x150+102 1/152x155那个事带分数,
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21/2x5+41/5x8+61/8x11+...+1001/149x150+1021/152x155那个事带分数,21/2x5+41/5x8+61/8x11+...+1001/149x150+102
2 1/2x5+4 1/5x8+6 1/8x11+...+100 1/149x150+102 1/152x155那个事带分数,
2 1/2x5+4 1/5x8+6 1/8x11+...+100 1/149x150+102 1/152x155
那个事带分数,
2 1/2x5+4 1/5x8+6 1/8x11+...+100 1/149x150+102 1/152x155那个事带分数,
2又1/2x5+4 又1/5x8+6又 1/8x11+...+100又 1/149x152+102又 1/152x155
=(2+4+6+……+100+102)+(1/2-1/5+1/5-1/8+1/8-1/11+……+1/149-1/152+1/152-1/155)÷3
=(2+102)×51÷2+(1/2-1/155)÷3
=2652+51/310
=2652又51/310
画出求1X3+ 2X4+ 3X5+ 4X6+ 5X7+ 6X8+ 7X8的值的程序框图
1/1x3+1/2x4+1/3x5+1/4x6+1/5x7+1/6x8
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9=
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.
1/2x5+1/5x8+1/8x11+.+1/2006x2009+2009x2013用裂项法计算
裂项法1/2X5+1/5x8+1/8x11.1/2009x2012=?
1/2x5 +1/5x8 +1/8x11+……+1/2009x2012=?
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8
1/(1x3)+1/(2x4)+1/(3x5)+1/(4x6)+1/(5x7)+1/(6x8)的答案
2 1/2x5+4 1/5x8+6 1/8x11+...+100 1/149x150+102 1/152x155那个事带分数,
23X5/221/2-5/6X1/2(5/12-7/18)X363/4X8/9-1/37/9+7/9X85/8X7-5/8X3
1x2+2x3+3x4+4x5+5x6+6x7+7x8+.+nx(n+1) 要公式,别搞太深奥!
1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11+ +nx(n+1)=
数学建模的LINGO使用问题modelmin=x0+x11+x8+x9;x0+x1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11=11;x0+x1+x3+x4>=4;x1+x2+x4+x5>=4;x2+x3+x5+x6>=4;x3+x4+x6+x7>=3;x4+x5+x7+x8>=3;x5+x6+x8+x9>=4;x6+x7+x9+x10>=4;x7+x8+x10+x11>=2;x8+x9+x11+x0>=2;x9+x10+x0+x1>=1;
简便计算 1/5x8除以4/5 (26+26/53)除以13 (2/5-1/3)x5/2简便计算 1/5x8除以4/5(26+26/53)除以13(2/5-1/3)x5/224x5/36-3/82/5除以(2/5+3/4)2/11除以1/9除以19/22
1/2x5+1/5x8+1/8x11+1/11x14+1/14x17+1/17x20