Question

Trace of matrix = Sum of diagoral elemerds
What diagonal elemerts of A be ( a, b ), ( c ).
Bbe d, e, f
( operatorname{fem} A+2 B=left[begin{array}{rrr}1 & 2 & 0 6 & -3 & 3 -5 & 3 & 1end{array}right] )
[
1+(-3)+1=a+b+c+21 d+e+f
]
from ( 2 A-B=left[begin{array}{ccc}2 & -1 & 5 2 & -1 & 6 0 & 1 & 2end{array}right] )
[
2-1+2=2(a+b+c)+(d+e+f) m(2)
]
( (2)-(1) Rightarrow(a+b+c)-(d+e+t)=3+1=94 )
( (1)+8) Rightarrow(a+b+c)+(d+e+t)=3-1=2 )
( (3)+(4) Rightarrow 2(a+b+c)=6 )
( (a+b+c)=3 )
brom
(3) ( (d+e+f)=(-1) ) ( T gamma(A)=(a+b+c)=3 )
( T_{0}(B)=(d+P+f)=-1 )
[
T_{gamma}(A)-cdots gamma(B)=3-(-1)=9
]

# T1207 12 -1 57 Let A + 2B= 6 -3 3 -1 6 and 2A-B=2 15 31 To 121 then Tr (A) - Tr(B) has the value is equal to (2) 0 (b) 1 (c) 2 (d) None of these

Solution