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Find the A.M. between: 12\ a n d-8...

Find the A.M. between: `12\ a n d-8`

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Let `A` be the Arithmetic mean.
Then `12, A, – 8` are in AP.
Now, let us solve
`A – 12 = – 8 – A `
...
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RD SHARMA-ARITHMETIC PROGRESSIONS-Solved Examples And Exercises
  1. if the A.M. between pth and qth terms of an A.P. be equal to the A.M. ...

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  2. Find the A.M. between: 7 and 13

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  3. Find the A.M. between: 12\ a n d-8

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  4. Find the A.M. between: (x-y)a n d\ (x+y)

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  5. Insert 4 A.M.s between 4 and 19.

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  6. Insert 7 A.M.s between 2 and 17.

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  7. Insert six A.M.s between 15 and -13.

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  8. There are n A.M.s between 3 and 17. The ratio of the last mean to the ...

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  9. Insert AMs between 7 and 71 such that 5^(th) AM is 27. Also find the n...

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  10. If n A.Ms are inserted between two numbers, prove that the sum of the ...

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  11. Insert five numbers between 8 and 26 such that the resulting sequence ...

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  12. A man saved Rs. 16500 in ten years. In each year after the first he sa...

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  13. A man saves Rs. 32 during the first year, Rs. 36 in the second year an...

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  14. A man arranges to pay a debt of Rs 3600 in 40 monthly installments whi...

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  15. A manufacturer of radio sets produced 600 units in the third year and ...

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  16. 25 trees are planted in a straight line 5 metre apart from each other....

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  17. A man is employed to count Rs. 10710. He counts at the rate of Rs. 180...

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  18. A piece of equipment cost a certain factory Rs. 600,000. If it depre...

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  19. A farmer buys a used tractor for Rs. 12000. He pays Rs. 6000 cash and ...

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