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In an A.P, first term is -5 and last ter...

In an A.P, first term is `-5` and last term is `45`. If sum of all the numbers in the A.P is `120`, then how many terms are there? What is the common difference?

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NAVNEET PUBLICATION-ARITHMETIC PROGRESSION-EXERCISE
  1. In an A.P, first term is -5 and last term is 45. If sum of all the num...

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  2. Solve :1+5+9+….+x=1770

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  3. How many numbers are there from 10 to 300 which when divided by 4 lea...

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  4. Choose the correct alternative from those given below each question: ...

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  5. Choose the correct alternative from those given below each question: ...

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  6. Choose the correct alternative from those given below each question: ...

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  7. Choose the correct alternative from those given below each question: ...

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  8. Choose the correct alternative from those given below each question: ...

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  9. Choose the correct alternative from those given below each question: ...

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  10. Choose the correct alternative from those given below each question: ...

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  11. Choose the correct alternative from those given below each question: ...

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  12. Choose the correct alternative from those given below each question: ...

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  13. Choose the correct alternative: For an A.P., t1=2, tn=41 and Sn=860....

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  14. Choose the correct alternative from those given below each question: ...

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  15. Choose the correct alternative from those given below each question: ...

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  16. Choose the correct alternative from those given below each question: ...

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  17. Choose the correct alternative from those given below each question: ...

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  18. Choose the correct alternative: The first term of an A.P. is 1 and n...

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  19. Find the first terem of the sequence: tn=3n+1

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  20. Find the first terem of the sequence: tn1/n^2-1

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  21. Find the first terem of the sequence: tn=4n-3

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