\(\left(\cfrac{1}{\sqrt2+1}+\cfrac{1}{\sqrt3+\sqrt2}+\cfrac{1}{2+\sqrt3}\right)\) এর সরলতম মান কত?
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\(\left(\cfrac{1}{\sqrt2+1}+\cfrac{1}{\sqrt3+\sqrt2}+\cfrac{1}{2+\sqrt3}\right)\)
\(=\cfrac{(\sqrt2-1)}{(\sqrt2+1)(\sqrt2-1)}+\cfrac{(\sqrt3-\sqrt2)}{(\sqrt3+\sqrt2)(\sqrt3-\sqrt2)} \) \(+\cfrac{(2-\sqrt3)}{(2+\sqrt3)(2-\sqrt3)}\)
\(=\cfrac{(\sqrt2-1)}{(\sqrt2)^2-(1)^2}+\cfrac{(\sqrt3-\sqrt2)}{(\sqrt3)^2-(\sqrt2)^2} \) \(+\cfrac{(2-\sqrt3)}{(2)^2-(\sqrt3)^2}\)
\(=\cfrac{(\sqrt2-1)}{2-1}+\cfrac{(\sqrt3-\sqrt2)}{3-2} \) \(+\cfrac{(2-\sqrt3)}{4-3}\)
\(=\cancel{\sqrt2}-1+\cancel{\sqrt3}-\cancel{\sqrt2}+2-\cancel{\sqrt3}\)
\(=2-1\)
\(=1\)

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