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If the sum of the first 14 terms of an A...

If the sum of the first 14 terms of an AP is 1050 and its first term is 10 , find the 20th term .

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The sum of first 15 terms of an A.P. is 750 and its first term is 15. Find its 20th term.

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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
  1. Find 23rd term of the AP 7, 3, 1, -1, .... ,-3.

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  2. The 5th and 13th term of an A.P are 5 and -3 respectively. Find the A....

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  3. If the sum of the first 14 terms of an AP is 1050 and its first term i...

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  4. The next term of the G.P. x ,x^2+2,a n dx^3+10 is (729)/(16) b. 6 c. 0...

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  5. If x^2+9y^2+25 z^2=x y z((15)/x+5/y+3/z), then x ,y ,a n dz are in a...

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  6. If the sum of n terms of an A.P. is given by Sn=a+b n+c n^2, w h e r ...

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  7. Find the sum of 20th term of the A.P (x+y), (x-y), (x-3y), ....

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  8. Find the sum of the series 2+5+8+11+.....+191

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  9. If p ,q ,a n dr are inA.P., show that the pth, qth, and rth terms of a...

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  10. If n >1 , the value of the positive integer m for which n^m+1 divides ...

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  11. For an increasing A.P. a1, a2, an ifa1+a3+a5=-12 and a1a3a5=80 , then...

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  12. If p(x)=(1+x^2+x^4++x^(2n-2))//(1+x+x^2++x^(n-1)) is a polomial in x ,...

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  13. Find the sum of all even integers between 101 and 199.

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  14. Match the statements/expressions given in column I with the values g...

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  15. Prove that 1+i^2+i^4+i^6 =0

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  16. if a ,b ,c are in G.P.,then (log)a 10 ,(log)b10,(log)c 10 are in

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  17. The 15th term of the series 2 1/2+1 7/(13)+1 1/9+(20)/(23)+.... i s (...

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  18. Let a1,a2,a3,.......a11 be real number satisfying a1=15,27-2a2gt0 anda...

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  19. The coefficients of x^n in (1+x/(1!)+x^2/(2!)+……+x^n/(n!))^2 is

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  20. If x^2+9y^2+25 z^2=x y z((15)/x+5/y+3/z), then x ,y ,a n dz are in a...

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