Q10 of 54 Page 128

If then

verify that A + (B + C) = (A + B) + C.

10) given

A = , B = and C


LHS = A + (B + C)


⇒


⇒


⇒


RHS = (A + B) + C


⇒


⇒


⇒


LHS = RHS


Hence proved


More from this chapter

All 54 →
8

Solve for x and y if

9

if then

Verify: (i) A + B = B + A (ii) A + ( – A) = O = ( – A) + A.

 11

An electronic company records each type of entertainment device sold at three of their branch stores so that they can monitor their purchases of supplies. The sales in two weeks are shown in the following spreadsheets.


Find the sum of the items sold out in two weeks using matrix addition.

 12

The fees structure for one – day admission to a swimming pool is as follows:


Write the matrix that represents the additional cost for non – membership.