matrizes Flashcards

1
Q

letra representa o numero de colunas

A

n

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2
Q

letra representa o numero de linhas

A

m

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3
Q

o que e aij

A

elemento da matriz

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4
Q

aij- i significa

A

linha

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5
Q

aij- j significa

A

coluna

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6
Q

calcule a23+ a12- a 22=

A2x3 = [-1 5 3]
[2 4 6] isso e uma matris interira

A

6+5-4
11-4=7

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7
Q

uma matriz quadrada

A

numero de linhas =numero de colunas

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8
Q

o que e uma matriz de ordem 2

A

2 linhas
2 colunas

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9
Q

quais elementos compon a diagonal principal

A

os elemntos em que i=j
como por exemlo a11 , a22, a33, ….

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10
Q

o que e uma matriz transposta

A

linha vira coluna e vice-versa

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11
Q

matriz A2x3
[ 2 3 5]
[-1 4 0]
faça a transposta dessa

A

sua transposta
[ 2 -1]
[ 3 4]
[ 5 0]

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12
Q

qual o valor dos elementos da diagonal principal de uma matriz identidade

A

1

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13
Q

qual o valor dos outros elementos sem ser diagonal principal de uma matriz identidade

A

nulos (0)

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14
Q

determine x e y

[ 2x 0]
[ y-3 1] =I2

A

[2x 0 ] = [1 0]
[y-3 1] [0 1]

2x=1 y-3=0
x=1/2 y=3

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15
Q
A
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