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The last term of an A.P. 2, 5, 8, 11, .....

The last term of an A.P. 2, 5, 8, 11, .... is .x. The sum of the terms of the A.P. is 155. Find the value of x.

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The correct Answer is:
x= 29
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ICSE-SEQUENCE AND SERIES -EXERCISE 14 (c)
  1. The interior angles of a polygon are in arithmetic progression. The sm...

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  2. Determine the sum of first 35 terms of an A.P. if t(2), = 1 and t(7) ,...

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  3. Find the sum of all natural numbers between 100 and 1000 which are mul...

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  4. How many terms of the A.P. 1,4,7.... are needed to give the sum 715?

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  5. Find the rth term of an A.P., sum of whose first n terms is 2n + 3n^(2...

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  6. In an arithmetical progression, the sum of p terms is m and the sum of...

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  7. The sum of the first fifteen terms of an arithmetical progression is 1...

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  8. The sum of the first six terms of an arithmetic progression is 42. The...

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  9. A sum of रु6240 is paid off in 30 instalments, such that each instalme...

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  10. The nth term of an A.P. is p and the sum of the first n term is s. Pro...

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  11. The sum of the first n terms of the arithmetical progression 3, 5(1)/(...

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  12. If the sum of the first 4 terms of an arithmetic progression is p, the...

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  13. The last term of an A.P. 2, 5, 8, 11, .... is .x. The sum of the terms...

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  14. A gentleman buys every year Banks' certificates of value exceeding the...

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  15. If the sums of the first n terms of two A.P.'s are in the ratio 7n-5: ...

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  16. If the ratio of the sum of m terms and n terms of an A.P. be m^2 : n^2...

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  17. Let a(1) , a(2) , a(3) , ..... be terms of an A.P. If (a(1)+a(2)+........

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  18. If the sum of n, 2n, 3n terms of an A.P are S(1), S(2), S(3), respecti...

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  19. If the sum of p terms of an A.P. is q and the sum of q terms is p, sho...

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  20. The ratio between the sum of n terms of two A.P.'s is (7n + 1) : (4n+2...

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