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If the nth terms of the two AP's 9, 7, 5...

If the `n`th terms of the two AP's 9, 7, 5, … and 24, 21, 18, … are the same, then find the value of `n`. Also, that term.

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The correct Answer is:
`-21 `
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OSWAL PUBLICATION-ARITHMETIC PROGRESSIONS -NCERT EXAMPLAR (EXERCISE-5.3)
  1. Split 207 into three parts such that these are in AP and the product o...

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  2. The angles of a triangle are in A.P. The greatest angle is twice the l...

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  3. If the nth terms of the two AP's 9, 7, 5, … and 24, 21, 18, … are the ...

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  4. If sum of the 3 ^(rd) and the 8^(th) terms of A.P. is 7 and the sum of...

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  5. Find the 12th term from the end of the AP-2, -4, -6, …, -100.

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  6. Which term of the AP 53, 48, 43, … is the first negative term ?

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  7. How many numbers lie between 10 and 300, which divided by 4 leave a re...

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  8. Find the sum of two middle terms of the AP -4/3,-1,-2/3,-1/3,...,4(1/3...

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  9. The first term of an AP is -5 and the last term is 45. If the sum of t...

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  10. Find the sum : 1+1.2+1.4+1.6+1.8+... (upto 21 terms)

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  11. Find: (4-1/n)+(7-2/n) +(10-3/n) ... upto n terms

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  12. Find the sum (i) 1+(-2)+(-5)+(-8)+ … +(-236) (ii) (4-(1)/(n))+(4-(...

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  13. Which term of the AP -2,-7,-12, … will be -77 ? Find the sum of this A...

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  14. If a(n)=3-4n, then show that a(1),a(2),a(3), … form an AP. Also, find ...

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  15. In an AP, If S(n)=n(4n+1), then find the AP.

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  16. In an AP, If S(n)=3n^(2)+5n and a(k)=164, then find the value of k.

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  17. If Sn denotes the sum of first n terms of an A.P., prove that S(...

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  18. Find the sum of first 17 terms of an AP whose 4th and 9th terms are -1...

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  19. If sum of first 6 terms of an AP is 36 and that of the first 16 terms ...

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  20. Find the sum of all the 11 terms of an AP whose middle most term is 30...

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