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1^(2) + 3^(2) + 5^(2)+……..up to n terms ...

`1^(2) + 3^(2) + 5^(2)+`……..up to n terms is……..

A

`(n(n+ 1)(2n+1))/(2)`

B

`(n(2n-1)(2n+1))/(3)`

C

`((n-1)^(2)(2n+1))/(6)`

D

`((2n+1)^(3))/(3)`

Text Solution

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The correct Answer is:
B
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  8. sqrt2 + sqrt8 + sqrt18 + sqrt32 +…..up to n terms is…….

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  9. 1^(2) + 3^(2) + 5^(2)+……..up to n terms is……..

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  10. If S(n)=1 + (1)/(2) + (1)/(2) + …..+ (1)/(2^(n-1)), (n in N) then …….

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  11. 0 lt theta lt (pi)/(2) then the minimum value of sin^(3) theta + cosec...

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  13. underset(r=1)overset(n)Sigma (underset(m=1)overset(r )Sigma m)=……

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  14. If 25, x - 6 and x - 12 are in G.P then x = .......... or ......... .

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  15. If 2,b,c, 23 are in G.P then (b-c)^(2)+ (c-2)^(2) + (23-b)^(2)= …….

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  16. If a + b + c = 5 then the maximum value of ab^(3)c is……

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  17. Three numbers a,b, c are between 2 and 18 such that a + b+ c= 25. If 2...

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