Omnipotent Data
: The book friends group is here! !
established a book friend group, the group number is: 7-0-6-8-0-0-5-8-9
There will be a problem when adding a group, the problem is below.
Hmm... everyone, please listen to the question! It's time to test whether you are a master student!
………………
There is a homogeneous linear equation system below
X1+X2+2X3-X4=0
2X1+X2+X3-X4=0
2X1+2X2+X3+2X4=0
The rank of the coefficient matrix of this equation system is the answer to the group! !
Welcome everyone to join the top academic exchange group! ! A warm welcome! !
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