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Find the sum of the first n terms of the series `1^3+3.2^2+3^3+3.4^2+5^2+3.6^2+....` when n is odd

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  2. Find the sum of the series 31^3+32^3+....+50^3dot

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  3. Find the sum of the first n terms of the series 1^3+3.2^2+3^3+3.4^2+5^...

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  4. Find the sum of the series 1.n+2(n-1)+3(n-2)+.....n.1.

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  5. Find the sum of the series (1^3)/1+(1^3+2^3)/(1+3)+(1^3+2^3+3^3)/(1+3+...

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  8. If a ,b ,c are in A.P., then prove that the following are also in A.P....

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  9. The Fibonacci sequence is defined by 1=a1=a2 and an=a(n-1)+a(n-2,)n > ...

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  14. Write the first three terms of the sequence defined by a1= 2,a(n+1)=(2...

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  15. Find the sequence of the numbers defined by an={1/n , when n is odd...

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