Matrix | Tensor Analysis Answers

A is 4 rowed square matrix. |A|=4, adj(adj(A))=? a)2A b)4A c)8A d)16A

Let N=[3 -4 0
4 3 0
0 0 1]

If M is any 3*3 real matrix, then trace(NMN^T) is equal to
a) trace(M)
b) 2 trace(N) + trace(M)
c) trace(N)^2 . trace(M)
d) trace(N)^2 + trace(M)

A is a square matrix of order 'n' has its determinant value as 5. If all the elements are multiplied by 2, its determinant value becomes 40. Then what is the value of 'n' ?

Find the value for x, y, z that satisfy the matrix relationship 3[■(2&x@y&z)] = [■(2&6@-1&2z)] + [■(4&x+z@y+z&3)] ?

a c 0 1 2 1
b d * 2 -1 = -1 0 Find Matrix a, b, c and d

. Mr. X went to market to purchase 3 kg of sugar, 10 kg of wheat and 1kg of salt. In a shop, ARPICO near to Mr. X’s residence, these commodities are priced at Rs 20, Rs10 and Rs 8 per kg whereas in the local market, CARGILLS these commodities are priced at Rs 15, Rs. 8 and Rs 6 per kg respectively. If the cost of travelling to CARGILLS is Rs 25, find
the net savings of Mr. X, using matrix multiplication method

Mr. X went to market to purchase 3 kg of sugar, 10 kg of wheat and 1kg of salt. In a shop, ARPICO near to Mr. X’s residence, these commodities are priced at Rs 20, Rs10 and Rs 8 per kg whereas in the local market, CARGILLS these commodities are priced at Rs 15, Rs. 8 and Rs 6 per kg respectively. If the cost of traveling to CARGILLS is Rs 25, find the net savings of Mr. X, using matrix multiplication method.

how to find the inverse of a 3 by 3 matrix

hi can u help me find this determinent 4 x 4 ..

det(A) = 3 4 -2 1
8 7 5 2
1 9 -3 1
6 5 -1 0