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Which term of the AP: 21,18,15, ...... I...

Which term of the AP: 21,18,15, ...... Is -81? Is there any term 0? Give reason for your answer.

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The correct Answer is:
`n = 53` and `n = 8`
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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-EXERCISE
  1. Which term of the AP: 21,18,15, ...... Is -81? Is there any term 0? Gi...

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  2. Which of these are arithmetic progressions and why? (i) 2,3,5,7,8,10...

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  3. Which of these are arithmetic progressions and why? (ii) 2,5,7,0,12,...

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  4. Which of these are arithmetic progressions and why? (iii) -1, -3, -5...

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  5. Write 3 more Arithmetic Progressions.

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  6. Think how each of the list given above form an A.P. Discuss with your ...

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  7. Think how each of the list given above form an A.P. Discuss with your ...

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  8. Think how each of the list given above form an A.P. Discuss with your ...

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  9. Think how each of the list given above form an A.P. Discuss with your ...

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  10. Think how each of the list given above form an A.P. Discuss with your ...

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  11. Think how each of the list given above form an A.P. Discuss with your ...

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  12. Draw the next two figures in the pattern above.

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  13. Make a positive Arithmetic Progression in which the common difference ...

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  14. Make an A.P. in which the common difference is big (large) positive qu...

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  15. Make an A.P. in which the common difference is negative.

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  16. Write three examples for finite A.P and three for infinite A.P.

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  17. Take any Arithmetic progression.

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  18. Add a fixed number to each and every term of A.P. Wrtie the resulting ...

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  19. Similarly subtract a fixed number from each and every term of A.P. Wri...

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  20. Multiply and divide each term of A.P. by a fixed number and write the...

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  21. Write the negation of the following statements and check whether the r...

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