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If a, b, c and d are in G.P. show that ...

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 b+b c+c d)^2` .

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CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
  1. Three non-zero numbers a ,b , c are in A.P. Increasing a by 1 or incre...

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

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

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

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  6. 'n' A.M's are inserted between a and 2b, and then between 2a and b. If...

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  7. If (a^n+b^n)/(a^(n-1)+b^(n-1)) is the A.M. between a and b, then find ...

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

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

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  11. The first terms of  a G.P. is 1. The sum of the third and fifth ter...

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  12. If a ,b ,c ,d ,e ,f are A.M.s between 2 and 12, then find the sum a+b+...

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  13. Three positive numbers from an increasing G.P. If the middle term in t...

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  14. Divide 28 into four parts in an A.P. so that the ratio of the product ...

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  15. The fourth, seventh, and the last term of a G.P. are 10, 80, and 2560,...

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  16. If (b-c)^2,(c-a)^2,(a-b)^2 are in A.P., then prove that 1/(b-c),1/(c-a...

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  17. If a ,b ,c,d are in G.P. prove that (a^n+b^n),(b^n+c^n),(c^n+d^n) ar...

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  18. Let Sn denote the sum of first n terms of an A.P. If S(2n)=3Sn , then ...

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

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  20. Find four number in an A.P. whose sum is 20 and sum of their squares i...

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