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Consider an A.P. a1, a2, a3,......... s...

Consider an A.P. `a_1, a_2, a_3,......... ` such that `a_3+a_5+a_8=11 and a_4+a_2=-2,` then the value of `a_1+a_6+a_7` is (a). -8`` (b). 5`` (c). 7`` (d). 9

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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
  1. The sum of three consecutiveterms of an AP is 21, and the sum of the s...

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  2. Let a1 , a2 , a3,.... be terms of an A.P. if (a1 + a2 +....+ ap)/(a1 +...

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  3. Consider an A.P. a1, a2, a3,......... such that a3+a5+a8=11 and a4+a2...

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  4. If the sum of n terms of an A.P is cn (n-1) where c ne 0 then find the...

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  5. If |a|<1a n d|b|<1, then the sum of the series 1+(1+a)b+(1+a+a^2)b^2+(...

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  6. Find the sum of odd intergers from 1 to 201.

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  7. If a1, a2, a3(a1>0) are three successive terms of a G.P. with common r...

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  8. Three numbers form an increasing G.P. If the middle number is doubled,...

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  9. If S1,S2, S3, Sm are the sums of n terms of m A.P. ' s whose first ter...

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  10. If S1,S2 and S3 be respectively the sum of n, 2n and 3n terms of a G.P...

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  11. There are 4n + 1 terms in a sequence of which first 2n + 1 are in Arit...

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  12. If (p+q)t h term of a G.P. is a and its (p-q)t h term is b where a ,b ...

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  13. Find the sum of n terms of the series whose nth term is T(n)=tanx/(2^n...

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  14. Evaluate, sum(i = 0)^iinfty sum(j = 0)^infty sum(k = 0)^infty 1/(3^i c...

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  15. The first trem of a GP is -3 and the square of the second term is equa...

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  16. If log(2)(5.2^(x)+1),log(4)(2^(1-x)+1) and 1 are in A.P,then x equals

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  17. Find the geometric series whose 5th and 8th terms are 80 and 640 respe...

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  18. 0ltthetaltpi/2, if x=sum(n=0)^inftycos^(2n)theta,y=sum(n=0)^inftysin^(...

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  19. The real numbers x1, x2, x3 satisfying the equation x^3-x^2+b x+gamma=...

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  20. Let a, b, c, d be real numbers in G.P. If u, v, w satisfy the system...

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