x+1=3 , 可 4x +1 亚 ? 2X 售 good
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x+1=3 , 可 4x +1 亚 ? 2X 售 good

IIT/JEE
Maths
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( x+frac{1}{2 x}=3 ) ( Rightarrow 2left(x+frac{1}{2 x}right)=2 times 3 ) ( Rightarrowleft(2 x+frac{1}{x}right)=6 ) ( Rightarrowleft(2 x+frac{1}{x}right)^{2}=(6)^{2}=36 ) ( Rightarrow 4 x^{2}+frac{1}{x^{2}}+4=36 ) ( Rightarrow 4 x^{2}+frac{1}{x^{2}}=32 ) ( therefore 4 x^{2}+frac{1}{x^{2}}=32 )
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