Question

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Answer 1

Answer:

1 : 5, 7 = 31

57 - 31 = 26

2 : 8, 3 = 81

83 - 81 = 2

3 : 9, 8 = 72

98 - 72 = 26

So, the series is like this : 26 , 2 , 26 , 2 , 26 , 2 .............

Now we want the output 2.

So,

4 : 77 - A = 2

A = 77 - 2

A = 75

Step-by-step explanation:

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Answer 2

Question :

Find the value of given determinant

Theory:

Determinant : Every square matrix associats to an expression or a number which is known as it's determimat.

⇒If $A=(a_{ij})$ is a square matrix of order n then determimat of A is denoted by |A|

• Value of determinant of order 2

⇒Value of a determinat of order 2 is equal to product of the principal diagonals element minus product of the preceding diagonals elements

Solution :

refer to the attachment

_____________

More information about determinats

1) |A'|=|A|

2)|AB|=|A||B|