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If 7 times the 7th term of an AP is equa...

If 7 times the 7th term of an AP is equal to 11 times its 11th term, then its 18th term will be

A

0

B

`-8`

C

18

D

77

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The correct Answer is:
A
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ARIHANT SSC-SEQUENCE, SERIES & PROGRESSIONS-INTRODUCTORY EXERCISE 18.1
  1. If the 3rd and 7th terms of an A.P. are 17 and 27 respectively . Find ...

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  2. Find the nth term of an A.P. whose 6th and 8th terms are 12 and 22 res...

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  3. If 7 times the 7th term of an AP is equal to 11 times its 11th term, t...

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  4. If the pth, qth and rth terms of an A.P. are a,b,c respectively , then...

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  5. If the pth term of an A.P. is q and its qth term is p then its mth ter...

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  6. Find the sum of the A.P. 11,13 , 15 , … , 99 :

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  7. Find the number of terms in the A.P. 22, 28, 34, ..., 616:

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  8. Find the sum of 222, 224, 226. ..., 888:

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  9. If the second and seventh terms of an A.P. are 2 and 22 respectively. ...

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  10. The 12th term of an AP is -13 and the sum of its first four terms is 2...

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  11. The third term of an A.P. is (1)/(5) and the 5th term is (1)/(3). Show...

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  12. How many terms of the A.P. 1,4,7,... are needed to give the sum 925 ?

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  13. How many terms of the series 20 + 16 + 12 amounts to 48?

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  14. p,q,r,s,t are first five terms of an A.P. such that P + r + t = -12 an...

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  15. The sum of all the terms of the A.P.7,10,13,... l is 1242. where l is...

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  16. Find the sum of all the integers between 55 and 533 which are divisibl...

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  17. How many terms are there in the A.P. whose first and fifth terms are ...

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  18. The first and last terms of an A.P. are - 7 and 233 and the sum of the...

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  19. The sum of three numbers in A.P. is 12 and the sum of their cubes is 4...

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  20. The series of natural numbers is written as follows: {:(,,1,,),(,2,3...

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