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The 19th term of an A.P. is equal to thr...

The 19th term of an A.P. is equal to three times its 9th term.If its `9th` term is 19, find the A.P.

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
  1. Show that the sequence defined by an=3n^2-5 is not an A.P.

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  2. Find the 10th term from the end of the A.P. 8,10,12, ... 126.

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  3. The 19th term of an A.P. is equal to three times its 9th term.If its...

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  4. If the 5th term of an A.P. is 31 and 25th term is 140 more than the...

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  5. The first and last term of an A.P. are a and l respectively. If S is...

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  6. Find the number of all three digit natural numbers which are divisible...

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  7. If the seventh term of an AP is 1/9 and its ninth term is 1/7, find it...

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  8. The 24th term of an A.P. is twice its 10th term. Show that its 72th...

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  9. If 2x ,x+10 ,3x+2 are in A.P., find the value of xdot

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  10. If the numbers a , b , c , d , e form an A.P. , then find the value of...

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  11. The 9th term of an A.P. is equal to 6 times its second term. If its...

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  12. The sum of 5th and 9th term of an A.P. is 72 and the sum of 7th and...

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  13. The sum of 4th and 8th terms of an A.P. is 24 and the sum of 6th an...

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  14. Write an AdotPdot having 4 as the first term and -3 as the comon diffe...

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  15. Write the first three terms in each of the sequence defined by the ...

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  16. What is 18th term of the sequence defined by an=(n(n-3))/(n+4)

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  17. Show that the sequence defined by an=4n+5 is an AdotPdot Also, find...

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  18. Show that the sequence defined by an=2n^2+1 is not an AdotPdot

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  19. Show that a sequence is an AdotPdot if its n t h term is a linea...

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  20. The n t h term of a sequence is 3n-2 . Is the sequence an AdotPd...

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