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The sum of four numbers in A.P. is 20 an...

The sum of four numbers in A.P. is 20 and sum of their squares is 120. Find the numbers.
Hint : Assume them as `a - 3d, a - d, a + d` and `a + 3d`.

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KALYANI PUBLICATION-PROGRESSION-EXERCISE
  1. The sum of the squares of three numbers in A.P. is 116. If the greates...

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  2. The sum of three numbers in A.P.is 30. If the product of the last...

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  3. The sum of four numbers in A.P. is 20 and sum of their squares is 120....

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  4. The sum of four numbers in A.P. is 40. If the sum of the product of fi...

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  5. If a, b, c are in A.P. then show that the terms given below are also i...

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  6. If a, b, c are in A.P. then show that the terms given below are also i...

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  7. If a, b, c are in A.P. then show that the terms given below are also i...

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  8. If a, b, c are in A.P. then show that the terms given below are also i...

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  9. If a, b, c are in A.P. then show that the terms given below are also i...

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  10. If a, b, c are in A.P. then show that the terms given below are also i...

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  11. If a^2,b^2,c^2 are in A.P., then the terms given below are also in A.P...

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  12. If a^2,b^2,c^2 are in A.P., then the terms given below are also in A.P...

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  13. If 1/a,1/b,1/c are in A.P. then (b+c)/a,(c+a)/b,(a+b)/c are also in A....

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  14. If 1/(a+b),1/(b+c),1/(c+a) are in A.P., then c^2,a^2,b^2are in A.P.

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  15. Insert three arithmetic mean between 2 and 14.

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  16. Insert three A.M.'s between 3 1/4 and 1 1/4.

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  17. Insert seven A.M.’s between 1 and 41.

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  18. Insert five A.M.'s between 1.2 and 8.4.

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  19. Determine four numbers between 7 and 4 such that these six numbers are...

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  20. Determine three quantities between x and 9x+ 4 such that these five nu...

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