## 68 Reputation

18 years, 21 days

## who can run this procedure!...

my computer is too slowly , its evaluating about 12 hours,but have no result. P4 512MB windows XPsp2 Maple 9.5 who have the strongest compter who can try to run it. (i guess maybe the procedure have some problem). View 1984_new equation with water out.mw on MapleNet or Download 1984_new equation with water out.mw
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## how to addition three parameter in one e...

Maple
i need to addition my equation like that,but this does not working. i try to use the >'add(add(add(x*y+y*z+z*x+a,x=x1),y=y1),z=z1);' but get the wrong answer, the 'a' addition 4-times. this is my original procedure: > x1:=[1,2,3,4,5,6,7,8,9]; x1 := [1, 2, 3, 4, 5, 6, 7, 8, 9] > y1:=[9,8,7,6,5,4,3,2,1]; y1 := [9, 8, 7, 6, 5, 4, 3, 2, 1] > z1=[4,5,6,3,2,1,9,8,7]; z1 = [4, 5, 6, 3, 2, 1, 9, 8, 7] > eq1:=add(x*y+y*z+z*x+a,{x=x1,y=y1,z=z1}); # 'a' is a const. Error, wrong number (or type) of parameters in function add

## how to solve this equation?...

Maple
this is the differential equation of second derivative. because i learn Maple not long. the equation name is 'eq5' > eq5:=D(D(x1))=(a1*fx1+a2*gx1)*D(x1)+(a1*fx2+a2*gx2)*D(x2)+(a1*fxt+a2*gxt); x1(t),in the file. if you interesting ,just download the file to help me to solve this problem. regards. View 1984_diff equ.mw on MapleNet or Download 1984_diff equ.mw
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## how to solve the differentiation in my w...

Maple
i have a problem of my equation with differentiation,in the first i run it total OK ,but when i input the value into the equation, the ERROR was show the screen. i don't know which step have the problem in my procedure. under is my maple file,(if you can't understand what mean of this procedure,just send me E-mail). regards View 1984_new equation with water out.mw on MapleNet or Download 1984_new equation with water out.mw
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## ask for help for the question of least s...

Maple
I have a problem with my project. It’s a mathematic problem of least square. And the mathematic formula maybe complex to me. So I have no idea to solve this question with MAPLE,because I learn maple a few day by myself, but the time of project will end in follow months. This is too bad for me. Maybe I need some help, but I don’t know who knew the maple around me. The last hope is the kinds of friend of mapleprimes.com . if you have interesting of my question,you can download my upload files. best regard's Download 1984_I have a problem with my project.doc
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