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The 24th term of an A.P. is twice its 10...

The 24th term of an A.P. is twice its 10th term. Show that its 72th term is 4 times its 15th term.

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The 14th term of an A.P. is twice its 8th term. If its 6th term is -8, then find the sum of its first 20 terms.

The 5th term of an A.P. is three times the first term. Prove that its 7th term will be two times the 3rd term.

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In certain A.P. the 24th term is twice the 10th term. Prove that the 72nd term is twice the 34th term.

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If 10 times the 10th term of an A.P. is equal to 15 times the 15th term, show that 25th term of the A.P. is zero.

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
  1. Find the number of all three digit natural numbers which are divisible...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  16. Write an AdotPdot whose first term is 10 and common difference is 3...

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  17. Write an AdotPdot whose first term and common difference are -1. 25...

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  18. Number of students left in the school auditorium from the total str...

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  19. The amount of money in the account every year, when Rs 10000 is deposi...

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  20. Find the common difference and write the next three terms of the Ad...

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