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#1 Help Me ! » least square system using matrix » 2008-03-17 23:30:21
- mamoo
- Replies: 0
hello
i have encountererd a problem with my assignment.
finidng the least square system of a system of coordinates.
i have been able to find it without the use of matrices. but the question insists of using matrices.
here is the questiion
consider the following data (x,y)= (0.2,4.459), (0.4,5.05),(0.6,6.2), (0.8,6.6) , (1.0,7.4)
Find the best straight lines , y=mx+c through all these points, by solving a least squares sysem of the type
how to find matrix A, U and B ?
please help
thnx in advance
#2 Re: Help Me ! » help with mechanics problem, plz » 2007-09-26 09:59:09
no one 
:'(
#3 Help Me ! » help with mechanics problem, plz » 2007-09-24 05:50:35
- mamoo
- Replies: 1
hi
i got an assignment to prove this theorem.
2 coplanar couples having equal and opposite moments, cancel each other.
there is a hint given.
Case 1: the lines of action of the two couples intersect
Case 2: the lines of action of the two couples do not intersect
please help
thnx
#4 Help Me ! » Groups and neighbourhood » 2007-09-17 09:30:24
- mamoo
- Replies: 2
can someone explain to me groups and neighbourhood. i dont understand anything.
please help
thnx
#5 Re: Help Me ! » Infinite series » 2007-09-17 09:27:25
but y u didn't start with
and use binomial expansion?would not it be better?
#6 Re: Help Me ! » complex numbers » 2007-09-15 05:24:49
wat does QED means?
#7 Re: Help Me ! » complex numbers » 2007-09-06 10:26:02
and by De Moivre Theorem
now consider 1 -i =
since cos(-x) = cos xnow with De Moivre Theorem
(1-i)^7 =
=
= since cos(-x) = cos x
=
since sin(7pi/4) = -sqrt(2)/2=
=
=
since (1/sqrt(2)^6) = (1/8)=
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