Solved papers for JEE Main & Advanced JEE Main Solved Paper-2014

done JEE Main Solved Paper-2014 Total Questions - 1

• question_answer1) If\[\alpha ,\beta \ne 0,\]and\[f(n)={{\alpha }^{n}}+{{\beta }^{n}}\]and\[\left| \begin{matrix}    3 & 1+f(1) & 1+f(2)  \\    1+f(1) & 1+f(2) & 1+f(3)  \\    1+f(2) & 1+f(3) & 1+f(4)  \\ \end{matrix} \right|=K\]\[{{(1-\alpha )}^{2}}{{(1-\beta )}^{2}}{{(\alpha -\beta )}^{2}},\]then K is equal to:   JEE Main  Solved  Paper-2014
  A)
  \[\alpha \beta \]                                             
  done clear
  B)
  \[\frac{1}{\alpha \beta }\]
  done clear
  C)
  \[1\]            
  done clear
  D)
  \[-1\]
  done clear
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