+1 +1 +2 +2 +3 +2 +3 +2 +2 +1 H Na Mg Ca Al Fe Fe Cu Zn NH4 -1 ( HCl盐酸 )NaCl(氯化钠) MgCl2 氯化镁我在那边交不上
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+1 +1 +2 +2 +3 +2 +3 +2 +2 +1 H Na Mg Ca Al Fe Fe Cu Zn NH4 -1 ( HCl盐酸 )NaCl(氯化钠) MgCl2 氯化镁我在那边交不上
+1 +1 +2 +2 +3 +2 +3 +2 +2 +1 H Na Mg Ca Al Fe Fe Cu Zn NH4 -1 ( HCl盐酸 )NaCl(氯化钠) MgCl2 氯化镁
我在那边交不上
+1 +1 +2 +2 +3 +2 +3 +2 +2 +1 H Na Mg Ca Al Fe Fe Cu Zn NH4 -1 ( HCl盐酸 )NaCl(氯化钠) MgCl2 氯化镁我在那边交不上
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2 1 -2 -3
1,1,1,2,2,2,3,3,3,填三阶幻方
1/(2^3)+1/(2^3+1)+1/(2^3+2)+1/(2^3+3)+...+1/(2^4-1)
1,1/2,3/2,3/8,( ),( )
1+1+2+2+3+3+````````````````````````````+99999
(1+1/2+1/3+...
[-2*1/4+(-1/2)3]*(-2*2/3)+(-1*2/3)2÷5/3
下面这段Matlab中BP神经网络模型的代码中的LP.lr=0.P=[1,2,1,3,1,2,3,2,2,1,3,2,3,2;2,1,3,2,1,1,3,3,2,1,3,2,3,2;1,1,3,3,1,2,2,3,2,1,3,2,2,2;1,2,1,3,1,2,1,1,1,1,1,2,2,2;2,2,1,1,1,2,1,2,2,2,3,2,3,2;1,3,1,3,1,2,1,2,1,2,2,1,1,3;2,3,1,3,1,2,1,2
求证1/1+1/2^(3/2)+1/3^(3/2)…+1/n^(3/2)
1+1+1+2+2×3
(1/2+1/3)÷(2/3-3/2)=?
2+2+3+4+1
1+2+3+4×2
1 2 3 2 ( ) 6
1+2+3/2=?
(-2/3)+1/2+4/5+(-1/2)+(-1/3)
1 3/2 0 3 1/2 2 -1 21 3/2 03 1/2 2-1 2 -3
1/1+1/2+2/2+1/2+1/3+2/3+3/3+2/3+1/3+.+1/20+2/20+.+20/20+.+2/20+1/20