Solved papers for JEE Main & Advanced JEE Main Paper (Held On 26 May 2012)

done JEE Main Paper (Held On 26 May 2012) Total Questions - 1

• question_answer1) If the sum of the series \[{{\text{1}}^{\text{2}}}+\text{2}.{{\text{2}}^{\text{2}}}+{{\text{3}}^{\text{2}}}+\text{2}.{{\text{4}}^{\text{2}}}+{{\text{5}}^{\text{2}}}+\]\[~...\text{ 2}.{{\text{6}}^{\text{2}}}+...\] upto n terms, when n is even, is\[\frac{n{{\left( n+1 \right)}^{2}}}{2},\]then the sum of the series, when n is odd, is  ,   JEE Main Online Paper (Held On 26-May-2012)      
  A)
  \[{{n}^{2}}(n+1)\]                           
  done clear
  B)
                          \[\frac{{{n}^{2}}(n-1)}{2}\]
  done clear
  C)
                         \[\frac{{{n}^{2}}(n+1)}{2}\]                        
  done clear
  D)
                         \[{{n}^{2}}(n-1)\]
  done clear
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