Math, asked by neelamtaruni143, 7 months ago

(5/4 + -1/2) + -3/2 = 5/4 + (-1/2 + -3/2​

Answers

Answered by abdullahrai4608
0

Answer:

5/4 + 1/2

ANSWER

(i)  

​  

 

3

0

3

​  

 

−1

0

−5

​  

 

−2

−1

0

​  

 

​  

 

Expanding along R  

1

​  

 

Δ=a  

11

​  

C  

11

​  

+a  

12

​  

C  

12

​  

+a  

13

​  

C  

13

​  

 

=3(−1)  

1+1

 

​  

 

0

−5

​  

 

−1

0

​  

 

​  

−1(−1)  

1+2

 

​  

 

0

3

​  

 

−1

0

​  

 

​  

−2(−1)  

1+3

 

​  

 

0

3

​  

 

0

−5

​  

 

​  

 

=3(0−5)+1(0+3)−2(0−0)

=−15+3

⇒Δ=−12

(ii)  

​  

 

3

1

2

​  

 

−4

1

3

​  

 

5

−2

1

​  

 

​  

 

Expanding along R  

1

​  

 

Δ=3(−1)  

1+1

 

​  

 

1

3

​  

 

−2

1

​  

 

​  

−4(−1)  

1+2

 

​  

 

1

2

​  

 

−2

1

​  

 

​  

+5(−1)  

1+3

 

​  

 

1

2

​  

 

1

3

​  

 

​  

 

Δ=3(1+6)+4(1+4)+5(3−2)

⇒Δ=21+20+5

⇒Δ=46

(iii)  

​  

 

0

−1

−2

​  

 

1

0

3

​  

 

2

−3

0

​  

 

​  

 

Expanding along R  

1

​  

 

Δ=0(−1)  

1+1

 

​  

 

0

3

​  

 

−3

0

​  

 

​  

+1(−1)  

1+2

 

​  

 

−1

−2

​  

 

−3

0

​  

 

​  

+2(−1)  

1+3

 

​  

 

−1

−2

​  

 

0

3

​  

 

​  

 

Δ=0−1(0−6)+2(−3−0)

⇒Δ=0+6−6

⇒Δ=0

(iv)  

​  

 

2

0

3

​  

 

−1

2

−5

​  

 

−2

−1

0

​  

 

​  

 

Expanding along R  

1

​  

 

Δ=2(−1)  

1+1

 

​  

 

2

−5

​  

 

−1

0

​  

 

​  

−1(−1)  

1+2

 

​  

 

0

3

​  

 

−1

0

​  

 

​  

−2(−1)  

1+3

 

​  

 

0

3

​  

 

2

−5

​  

 

​  

 

Δ=2(0−5)+1(0+3)−2(0−6)

⇒Δ=−10+3+12

⇒Δ=5

Step-by-step explanation:

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