Advertisement

If A = [2-35-4-61],B=[-122203]and C=[43-14-21], Show that A + B = B + A

Exercise 2.2 | Q 1.1 | Page 46

QUESTION

If A = [2-35-4-61],B=[-122203]and C=[43-14-21], Show that A + B = B + A

SOLUTION

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 get
A + B = B + A.