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The sum of the series 1^3 - 2^3 + 3^3 - ...

The sum of the series `1^3 - 2^3 + 3^3 - ....+ 9^3`=

A

300

B

125

C

425

D

0

Text Solution

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The correct Answer is:
B
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PATHFINDER-PROGRESSION AND SERIES -QUESTION BANK
  1. ABC is a right angled triangle in which angleB=90^@ and BC=a. If n poi...

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  2. If a,b,c are three distinct positive real number such that a^2+b^2+c^2...

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  3. The sum of the series 1^3 - 2^3 + 3^3 - ....+ 9^3=

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  4. If x1, x2 , x3 and y1 , y2 , y3 are both in G.P. with the same common ...

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  5. Let two numbers have arithmetic mean 9 and geometric mean 4. Then thes...

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  6. The sum of the first n terms of the series 1^2+2.2^2+3^2+2.4^2+5^2+2.6...

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

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  8. If a1,a2,.....an are in H.P., then the expression a1a2 + a2a3 + ... + ...

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  9. If the sum of first n natural numbers is 1/5 times the sum of their sq...

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  10. log3 2 , log6 2 and log12 2 are in

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  11. If x be the AM and y,z be two GM's between two positive numbers, then ...

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  12. If In (a + c), In(c - a) , In(a - 2b + c) are in A.P., then

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  13. The sum of the numerical series 1/(sqrt3 + sqrt7) + 1/(sqrt7 + sqrt11)...

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  14. Suppose that F(n + 1) =(2F(n) + 1)/2 for n = 1,2,3,,,, and F(1) = 2. T...

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  15. The series of natural number is divided into groups 1 , 2, 3, 4,.........

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  16. sum(i = 1)^n sum(j = 1)^i sum(k = 1)^j 1 is equal to

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  17. The sides of a right angle triangle from a G.P. the tangent of the sma...

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  18. If the first & the (2n + 1)th terms of an A.P. , a G.P & an H.P. of po...

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  19. If the arithmetic mean of two positive numbers a & b (a gt b) is twice...

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  20. If Sn denotes the sum to n terms of the series (1 le n le 9) 1 + 22 + ...

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