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The first term of an A.P. is 5, the c...

The first term of an A.P. is 5, the common difference is 3 and the last term is 80; find the number of terms.

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RD SHARMA-ARITHMETIC PROGRESSIONS-All Questions
  1. Is -150 a term of the A.P. 11 ,\ 8,\ 5,\ 2,\ ?

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  2. How many terms are there in the A.P? 7,\ 10 ,\ 13 ,\ 43. (ii) -1,\ ...

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  3. The first term of an A.P. is 5, the common difference is 3 and the ...

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  4. The 6th and 17th terms of an A.P. are 19 and 41 respectively, findt...

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  5. If 9t h term of an A.P. is zero, prove that its 29 t h term is d...

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  6. If 10 times the 10 t h term of an A.P. is equal to 15 times the ...

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  7. The 10 t h and 18 t h terms of an A.P. are 41 and 73 respectively. ...

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  8. In a certain A.P. the 24 t h term is twice the 10 t h term. Prov...

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  9. If the n^(th) term of the A.P. 9, 7, 5, .... is same as the n^(th) ter...

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  10. Find the 12 t h term from the end of the following arithmetic progr...

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  11. The 4t h term of an A.P. is three times the first and the 7t h term...

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  12. Find the second term and n t h term of an A.P. whose 6t h term i...

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  13. How many numbers of two digit are divisible by 3?

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  14. An A.P. consists of 60 terms. If the first and the last terms be 7 ...

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  15. The sum of 4th and 8th terms of an A.P. is 24 and the sum of the 6th...

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  16. The first term of an A.P. is 5 and its 100 t h term is -292 . Find ...

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  17. Find a(30)-a(20) for the A.P. -9,\ -14 ,\ -19 ,\ -24 ,\ dot (ii) a ...

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  18. Write the expression an-ak for the A.P. a ,\ a+d ,\ a+2d ,\ ddot...

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  19. Write the expression an-ak for the A.P. a ,\ a+d ,\ a+2d ,\ ddot...

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  20. Write the expression an-ak for the A.P. a ,\ a+d ,\ a+2d ,\ ddot...

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