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If a, b, c, d, e,f are in A.P., then e -...

If a, b, c, d, e,f are in A.P., then e - c is equal to

A

2(c -a)

B

2(f-d)

C

2(d-c)

D

d-e.

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MODERN PUBLICATION-SEQUENCES AND SERIES-EXERCISE
  1. If a, b, c are in A.P. then 3^a, 3^b, 3^c are in:

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  2. If the third term of an A.P is 12 and the seventh term is 24, then the...

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  3. If a, b, c, d, e,f are in A.P., then e - c is equal to

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  4. The third term of a GP is 3. What is the product of the first five ter...

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  5. 5th term of a G.P. is 2, then the product of first 9 terms is:

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  6. If the pth , qth , rth , terms of a GP . Are x,y,z respectively prove ...

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  7. The sum of the first n odd number is :

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  8. If the sum of n natural numbers is one sixth of their squares, then n ...

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  9. The sum of the numbers 1, 4, 9, 16, ... , 100 is :

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  10. If p, q, r are in A.P. while x, y, z are in G.P., prove that x^(q-r).y...

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  11. If a^x=b^y=c^z and a, b, c are in G.P. then x,y,z are in :

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  12. If a,b,c are in AP and (a+2b-c)(2b+c-a)(c+a-b)=lambdaabc, then lambda...

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  13. 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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  14. Sum of the series 1^(2) + 3^(2) + 5^(2) + … + n^(2) is :

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  15. 11^3+12^3+13^3+....+20^3 is :

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  16. If the 10th term of a G.P. is 9 and 4th term is 4, then its 7th term i...

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  17. The 6th term of a G.P. is 32 and its 8th term is 128, then the value o...

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  18. 11^3+12^3+13^3+....+20^3 is :

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  19. A boy goes to school from his home at a speed of x km/hr. and comes ba...

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  20. If a,a(1),a(2),a(3),"......",a(2n)b are in AP and a,b(1),b(2),b(3),".....

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