Consider a solution x_1 of the linear system Ax=b. Justify the facts stated in parts (a) and (b): a) If x_h is a solution of the system Ax=0, then x_1+x_h is a solution of the system Ax=b. b) If x_2 is another solution of the system Ax=b, then x_2-x_1 is a solution of the system Ax=0

Chaya Galloway

Chaya Galloway

Answered question

2021-03-20

Consider a solution x1 of the linear system Ax=b. Justify the facts stated in parts (a) and (b):
a) If xh is a solution of the system Ax=0, then x1+xh is a solution of the system Ax=b.
b) If x2 is another solution of the system Ax=b, then x2x1 is a solution of the system Ax=0

Answer & Explanation

Maciej Morrow

Maciej Morrow

Skilled2021-03-22Added 98 answers

Consider a solution x1 of the linear system Ax=b. Justify the information presented in parts. (a) and (b): 
Thus,
Axh=0 
Add equation 
Ax1+axh=b+0=b 
A(x1+xh)=b 
Therefore,
(x1+xh) is asolution of Ax=b since x=x1+xh satisfies this equation. 
b) If x2 is another solution of the system Ax=b, then x2x1 is asolution of the system Ax=0 
Ax2=b 
Ax2=Ax1=bb=0 
A(x2x1)=0 
Hence (x2x1) is solution of 
Ax=0 
Since x=x2x1 satisfies the equation. 

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