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Explain the terms in the formula. S(n)...

Explain the terms in the formula.
`S_(n) = n/2 [2a+(n-1)d]`.

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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-EXERCISE
  1. If seven times of 7th term of an Arithmetic Progression is euqal to th...

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  2. Measures of sides of a triangle are in Arithmetic Progression. Its per...

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  3. Explain the terms in the formula. S(n) = n/2 [2a+(n-1)d].

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  4. Find the sum of first 10 terms of an A.P. 3, 15, 27, 39,…..

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  5. Find the value of 'k' , so that k+2, 4k-6 and 3k-2 are the three conse...

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  6. Find the 7^(th) term from the end of the Arithmetic Progression. 7, ...

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  7. Write the formula of n^(th) term of G.P. and explain the terms in it.

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  8. In a rangoli design of 13 rows, every row increases its previous row b...

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  9. Which term of the G.P. : sqrt2, 2, 2sqrt2, 4, ....... is 32 ?

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  10. A manufacture of TV sets produced 500 sets in the third year and 700 s...

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  11. A manufacture of TV sets produced 500 sets in the third year and 700 s...

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  12. Find the sum of all 3 digit numbers that are divisible by 4.

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  13. The sum of the three terms which are in an Arithmetic Progression is 3...

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  14. Find the sum of all three digit natural numbers, which are divisible b...

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  15. The sum of 5^(th) and 9^(th) terms of A.P. is 72 and the sum of 7th an...

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  16. Which term of G.P. : 3, 9, 27, ….. Is 2187?

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  17. Find the sum of all two digit positive integers which are divisible by...

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  18. Find the sum of all two digit odd multiples of 3.

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  19. Find the sum of the integers between 100 and 500 that are divisible by...

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  20. Find the sum of all the integers between 1 to 50 which are not divisib...

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