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Find the sum of n terms of an A.P. whose...

Find the sum of `n` terms of an A.P. whose kth terms is `5k+1.`

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
  1. If 12th term of an A.P. is -13 and the sum of the first four terms i...

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  2. If the 5th and 12th terms of an A.P. are 30 and 65 respectively, wha...

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  3. Find the sum of n terms of an A.P. whose kth terms is 5k+1.

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  4. Sum of all two digit numbers which when divided by 4 yield unity as re...

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  5. If the sum of a certain number of terms of the AP 25,22,19... is 116. ...

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  6. How many terms of the A.P. -6, -(11)/2,\ -5,... are needed to give the...

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  7. In an A.P. the first term is 2 and the sum of the first five terms is ...

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  8. If Sn=n P+(n(n-1))/2Q ,w h e r eSn denotes the sum of the first n term...

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  9. The sum of n terms of two arithmetic progressions are in the ratio 5n+...

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  10. If 2/3, k ,5/8 are in A.P., find the value of kdot

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  11. If 1/a ,1/b ,1/c are in A.P. prove that: (b+c)/a ,(c+a)/b ,(a+b)/c are...

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  12. If a, b, c are in A.P., prove that a^(2)(b+c),b^(2)(c+a),c^(2)(a+b)" a...

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  13. If a, b, c are in A.P, then show that: b+c-a ,\ c+a-b ,\ a+b-c are in ...

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  14. If a, b, c are in A.P, then show that: \ b c-a^2,\ c a-b^2,\ a b-c^2 a...

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  15. If (b+c)/a,(c+a)/b,(a+b)/c are in A.P. show that 1/a,1/b1/c are als...

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  16. If (b+c)/a ,(c+a)/b ,(a+b)/c are in A.P., prove that : b c ,\ c a ,\ a...

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  17. If a\ (1/b+1/c),\ b(1/c+1/a),\ c(1/a+1/b) are in A.P. prove that a ,\ ...

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  18. Insert 3 arithmetic means between 3 and 19.

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  19. For what value of n ,\ dot(a^(n+1)+b^(n+1))/(a^n+b^n) is the arithmeti...

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  20. Between 1 and 31 are inserted m arithmetic mean so that the ratio of t...

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