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	Các bình luận về: 83. Biết \(\int_{\ln \sqrt 3 }^{\ln \sqrt 8 } {\frac{1}{{\sqrt {{{\rm{e}}^{2x}} + 1}&#160; &#8211; {{\rm{e}}^x}}}} {\rm{d}}x = 1 + \frac{1}{2}\ln \frac{b}{a} + a\sqrt a&#160; &#8211; \sqrt b {\rm{ }}\)&#160; với \(a,b \in {\mathbb{Z}^ + }\).



Tính \(P = a + b\)?	</title>
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