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Prove that 5+3√2 is an irrational number

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Answered by Anonymous
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Answered by Anonymous
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  \underline{ \sf \fcolorbox{red}{pink}{ \huge{Solution :)</p><p>}}}

Let us assume, to the contrary , that

5 + 3√2 is rational number

So ,

 \sf  \mapsto 5 + 3 \sqrt{2}  =  \frac{a}{b}  \\  \\  \sf  \mapsto</p><p>3 \sqrt{2}  =  \frac{a}{b}  - 5 \\  \\  \sf  \mapsto</p><p> \sqrt{2}  =  \frac{a - 5b}{3b}

(a - 5b)/3b is rational and so is √2 ,

But this contradicts the fact that √2 Is irrational , So we conclude that 5 + 3√2 is an irrational number

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