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The third term of an A.P. is 7 and the s...

The third term of an A.P. is 7 and the seventh term exceeds three times the third term by 2. Find the first term, the common difference and the sum of first 20 terms.

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RD SHARMA-ARITHMETIC PROGRESSIONS-All Questions
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  2. The first and the last terms of an AP are 17 and 350 respectively. ...

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  3. The third term of an A.P. is 7 and the seventh term exceeds three time...

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  4. The first term of an A.P.is 2 and the last term is 50. the sum of all ...

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  5. If 12th term of an A.P. is -13 and the sum of the first four terms i...

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  6. Find the sum of first 22 terms of an AP in which d=l and 22nd term is ...

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  7. Find the sum of all natural numbers between 1 and 100, which are divis...

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  8. Find the sum of first n odd natural numbers.

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  9. Find the sum of all odd numbers between (i) 0 and 50 (ii) 100 and 2...

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  10. Show that the sum of all odd integers between and 1000 which are divis...

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  11. Find the sum of all integers between 84 and 719, which are multiples o...

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  12. Find the sum of all integers between 0 and 500 which are divisible by ...

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  13. Find the sum of all even integers between 101 and 999.

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  14. Find the sum of all integers between 100 and 50, which are divisible b...

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  15. In an A.P., if the first term is 22, the common difference is -4 an...

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  16. In an A.P., if the 5t h and 12 t h terms are 30 and 65 respectiv...

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  17. Find the sum of the first 11 terms of the A.P.: 2,\ 6,\ 10 ,\ 14 ,\...

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  18. Find the sum of the first 13 terms of the A.P: -6,\ 0,\ 6,\ 12 ,\ ...

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  19. Find the sum of the first 51 terms of the A.P.: whose second term i...

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  20. Find the sum of the first 15 multiples of 8

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