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Find the sum of the first 100 natural nu...

Find the sum of the first 100 natural numbers.

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AGRAWAL PUBLICATION-ARITHMETIC PROGRESSIONS-EXAMPLE
  1. Fill in the blanks The number of terms of AP: 18, 16, 14, ……. That ma...

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  2. Fill in the blanks Secons term of the AP if its sn = n^2 +2n is …….

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  3. Find the sum of the first 100 natural numbers.

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  4. It the mean of the first n natural number is 15, then find n.

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  5. If in an A.P, a=15, d=-3 and an = 0, then find the value of n.

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  6. Find the number of terms in the A.P: 18, 15 1/2,13,…., -47.

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  7. Find the common difference of the Arithmetic Progression (A.P)

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  8. Justify whether it is true to say that -1, -3/2, -2, 5/2, …..from an A...

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  9. How many 2-digit numbers are divisuble by 3?

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  10. In an AP, if the common difference (d) = -4, and the seventh term (a7)...

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  11. Write the n^(th) term of the A.P. 1/m ,(1+m)/m, (1+2m)/m.

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  12. If the n^(th) term of the A.P. -1,4,9,14, … is 129, find the value of ...

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

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

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

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

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

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

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  19. Find the mean of first eleven natural numbers.

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

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