\(a = \frac{{\sqrt 2 + 1}}{{\sqrt 2 - 1}}\) மற்றும் \( b = \;\frac{{\sqrt 2 + 1}}{{\sqrt 2 - 1}},\) என்றால், \(\frac{{{a^3}\; - \;{b^3}}}{{3ab\left( {a + b} \right)}} + \frac{b}{a} - a = \) இன் மதிப்பு என்னவாக இருக்கும்

1
\(\frac{2}{{\sqrt 2 - 1}}\)
2
\(\frac{{ - 2}}{{\sqrt 2 - 1}}\)
3
\(\frac{{ - 1}}{{\sqrt 2 - 1}}\)
4
\(\frac{{{a^3}\; - \;{b^3}}}{{3ab\left( {a + b} \right)}}\)

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