Q9 of 108 Page 100

Find x, if

Multiplying matrices on the left hand side

L.H.S =


=


=


=


=


=


=


R.H.S = O


=


∴ L.H.S = R.H.S we get,



x2 – 48 =0


x2 = 48



Hence the required value of


More from this chapter

All 108 →
7

For what values of

8

If show that A2 – 5A + 7I =0.

 10

A manufacturer produces three products x, y, z which he sells in two markets. Annual sales are indicated below:


(a) If unit sale prices of x, y and z are Rs. 2.50, Rs. 1.50 and Rs. 1.00, respectively, find the total revenue in each market with the help of matrix algebra.


(b) If the unit costs of the above three commodities are Rs. 2.00, Rs. 1.00 and 50 paise respectively. Find the gross profit.

 11

Find the matrix X so that