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The sum of three numbers in G.P. is 70, ...

The sum of three numbers in G.P. is 70, if the two extremes be multipled each by 4 and the mean by 5, the new numbers so formed are in A.P. Find the product of original numbers :

A

8000

B

6000

C

7000

D

none of these

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The correct Answer is:
A
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QUANTUM CAT-SEQUENCE, SERIES & PROGRESSIONS-QUESTION BANK
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  2. Sum of three consecutive terms in a G.P. is 42 their product is 512 . ...

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  3. The sum of three numbers in G.P. is 70, if the two extremes be multipl...

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  4. The sum of four terms in G.P. is 312 . The sum of first and fourth ter...

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  5. A bouncing tennis ball rebounds each time to a height equal to one hal...

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  6. Find the sum of n terms of the series" 7 + 77 + 777 + …

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  7. Find the sum of n terms of 0.8 + 0.88 + 0.888 + …

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  8. If the pth, qth and rth terms of a G.P. be respectively , a,b and c th...

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  9. If a,b,c are respectively the xth, yth and zth terms of a G.P. then th...

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  10. There are four numbers such that the first three of them form an Arith...

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  11. Find the sum of n terms of the series 1+3 +7 +15 + …

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  12. Find the sum to n terms :1/2+3/2^2+5/2^3+...+(2n-1)/2^n

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  13. Find the sum to n terms of the series 11+ 102+1003+10004+… :

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  14. Find the sum of first n groups of (1) + (1+3) +(1+3+9) + (1+3+9 +27) +...

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  15. Find the sum to n terms of the following series : 2+5+14+41 + …

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  16. Find the sum to n terms : 1+ 2x + 3x^2 + 4x^3 + … ,xne 1 :

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  17. Find the sum to infinity of the series 1+3x+5x^2+7x^3+oow h e n|x|<1.

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  18. Find the sum to first n terms : 1+2/3 + 3/(3^2) + 4/(3^3)+….

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  19. Find the sum to n terms of 3 * 2 + 5*2^2 + 7*2^3 + ….

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  20. Find the sum of the series 1+4/5+7/(5^2)+10/(5^3)+...

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