Question

From the following transactions of concern, prepare the Machinery Account for the year ending 31 st March, 2017 :
1.4.17 Purchased a second – hand machinery for Rs.40,000
1.4.17 Spent Rs.10,000 on repairs for making it serviceable.
30.9.17 Purchased additional new machinery for Rs.20,000
31.12.17 Repairs and renewals of machinery Rs.3,000.
31.3.18 Depreciate the machinery at 10% per annum.

aij = (i j)²/2 

What is ratio 

Give verification

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3rd question video is not available 

chapter 1

HOW the 12×3/4
    =4×4 
How it come 

            

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An=n2/2n:a6

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an=(-1)n-1 5n 1

an=(-1)n-1 5n 1