Exercise 2.2 | Q 1.1 | Page 46
If A = [2-35-4-61],B=[-122203]and C=[43-14-21], Show that A + B = B + A
A + B = [2-35-4-61]+[-122203]
= [2-1-3+25+2-4+2-6+01+3]
∴ A + B = [1-17-2-64] ....(i)
B + A = [-122203]+[2-35-4-61]
= [-1+22-32+52-40-63+1]
∴ B + A = [1-17-2-64] ....(ii)
From (i) and (ii), we getA + B = B + A.