Question

Na matriz A=(aij) 5×4 onde aij= 4i-j2 determine os valores abaixo:
(A) a23
(B) a32
(C) a13
(D) a14
(E) a53

Answer 1

$a_{i,j} = 4i-j^2$

a) $a_{2,3} = 4\cdot(2)-(3)^2 = 8-9 = -1$

b) $a_{3,2} = 4\cdot(3)-(2)^2 = 12-4 = 8$

c) $a_{1,3} = 4\cdot(1)-(3)^2 = 4-9 = -5$

d) $a_{1,4} = 4\cdot(1)-(4)^2 = 4-16 = -12$

e) $a_{5,3} = 4\cdot(5)-(3)^2 = 20-9 = -11$