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In an A.P. third term is 14 and 8th term...

In an A.P. third term is 14 and 8th term is 34. Find `S_n` and `S_(20)` .

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MBD-ARITHMETIC PROGRESSION-EXERCISE
  1. A manufacturer of PC’s produced 600 sets in the third year and 700 set...

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  2. Find the sum of first 10 terms an A.P. if T1 = - 14 and T5 = 20.

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  3. In an A.P. third term is 14 and 8th term is 34. Find Sn and S(20) .

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  4. Find the sum of all natural numbers below 500 which are divisible by 8...

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  5. Find the sum of all natural numbers between 99 and 1001 which are mult...

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  6. Find the sum of all natural numbers between 1 and 100 which are multip...

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  7. Find the sum of first hundred even natural numbers divisible by 5.

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  8. Find the sum of all odd numbers of four digits which are divisible by ...

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  9. Find the sum of all natural numbers from 1 to 1000 which are not divis...

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  10. Find the sum of all 3-digit numbers which leave remainder 2, when divi...

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  11. The sum of three consecutive numbers of an A.P. is 27 and their produc...

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  12. The sum of four numbers in an A.P. is 16 and sum of their squares is 8...

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  13. The sum of n terms of an A.P. is 3n^2 + 4n. Find the A.P.

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  14. If the sum of n terms of an A.P. is 3n^2 + 2n : Find the rth term.

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  15. Determine an A.P. whose sum of n terms is n (n + 2). Find also the 21s...

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  16. In a sequence, the sum of first n terms is Sn = 2n^2 + 3n + 1, for all...

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  17. If the sum of n terms of a series is a + bn + cn^2. Find the nth term ...

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  18. If Sn denotes the sum of n terms of an A.P. whose first term is a, and...

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  19. For an A.P., show that Tp+T(p+2q)=2T(p+q) .

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  20. The first and last terms of an A.P. are a and l respectively. Show th...

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