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For the AP: -3,-7,-11, ……, can we direct...

For the AP: -3,-7,-11, ……, can we directly find `a_(30) - a_(20) without actually finding `a_(30) and a_(20)`? Give reasons for your answer.

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AGRAWAL PUBLICATION-ARITHMETIC PROGRESSIONS-EXAMPLE
  1. If the n^(th) term of the A.P. -1,4,9,14, … is 129, find the value of ...

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  2. Find the 9th term from the end (towards the first term) of the A.P. 5,...

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  3. For the AP: -3,-7,-11, ……, can we directly find a(30) - a(20) without ...

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  4. If the first three terms of an A.P are b, c abd 2b, then find the rati...

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  5. What is the common difference of an A,P in which a(21) - a7 =84?

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  6. For what value of k will k+9, 2k -1 and 2k+7 are the consecutive terms...

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  7. Find the 16^(th)term of the AP,2,7,12,17,……

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  8. Find the mean of first eleven natural numbers.

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  9. Show that (a+b)^2, (a^2 + b^2) and (a+b)^2 are in AP.

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  10. If the 17^(th) term of an A.P exceeds its 10^(th) term by 7, Find the ...

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  11. Hoe many multiples of 4 die between 10 and 205?

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  12. Determine the A.P. whose third term is 16 and 7^(th) term exceeds the ...

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  13. Two AP's have the same common difference.The first term of one AP is 2...

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  14. Which term of the AP 3,15,27, 39,…. Will be 120 more than its 21st ter...

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  15. If Sn the sum of first n terms of an AP is given by Sn =3n^2-4n, find ...

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  16. Find the sum of first 8 multiples of 3.

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  17. If seven times the 7^(th) term of an A.P is equal to eleven times the ...

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  18. The 10^(th) term of an A.P is -4 and its 22^(nd) term is (-16) . Find ...

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  19. Find how many integers between 200 and 500 are divisible by 8.

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  20. Determine the AP whose third term is 5 and the seventh term is 9.

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