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Find the number of terms in the series 2...

Find the number of terms in the series `20 ,19 1/3,18 2/3...` the sum of which is 300. Explain the answer.

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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
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  2. If a ,b ,c are in G.P. and a-b ,c-a ,a n db-c are in H.P., then prove ...

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  3. Find the number of terms in the series 20 ,19 1/3,18 2/3... the sum of...

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  5. Find the sum of all three-digit natural numbers, which are divisible b...

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  7. Prove that a sequence in an A.P., if the sum of its n terms is of the ...

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  8. The product of the three numbers in G.P. is 125 and sum of their pr...

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  11. Three non-zero numbers a ,b , c are in A.P. Increasing a by 1 or incre...

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  12. A G.P. consists of an even number of terms. If the sum of all the t...

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  13. If a, b, c and d are in G.P. show that (a^2+b^2+c^2)(b^2+c^2+d^2)=(a ...

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  14. If the sum of n terms of a G.P. is 3-(3^(n+1))/(4^(2n)) , then find ...

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  15. Which term of the G.P. 2,1, 1/2,1/4, i s1/(128)?

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  18. The first and second terms of a G.P. are x^(-4) and x^n , respectively...

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  19. If (a+b x)/(a-b x)=(b+c x)/(b-c x)=(c+dx)/(c-dx)(x!=0), then show t...

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  20. If n arithmetic means are inserted between 2 and 38, then the sum of t...

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