问题描述：
这个lingo程序错在哪了?
model:
sets:
row/1..3/:b;
col/1..2/:c,x,l,u;
matrix(row,col):A;
endsets
min=@sum(col:c*x);
@for(col:@bnd(l,x,u));
@for(row(i):
@sum(col(j):A(i,j)*x(j)
model:
sets:
row/1..3/:b;
col/1..2/:c,x,l,u;
matrix(row,col):A;
endsets
min=@sum(col:c*x);
@for(col:@bnd(l,x,u));
@for(row(i):
@sum(col(j):A(i,j)*x(j)
问题解答：
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