Cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqaMrevLHfij5gC1rhimfMBNvxyNvga7XvAUrhxSL % wBPr3CFTNm951E103ECzMCHn2ECrxz4r3EK1hE9ThE91xpCXMBGewF % amXvP5wqSXMqHnxAJn0BKvguHDwzZbqefqvATv2CG4uz3bIuV1wyUb % qedmvETj2BSbqefm0B1jxALjhiov2DaebbnrfifHhDYfgasaacH8Yj % Y-vipgYlh9vqqj-hEeeu0xXdbba9frFj0-OqFfea0dXdd9vqai-hGu % Q8kuc9pgc9q8qqaq-dir-f0-yqaiVgFr0xfr-xfr-xb9adbaqaaeGa % ciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8qadaWdXbWdaeaape % WaaSaaa8aabaWdbiaabsgacaWG4baapaqaa8qacaWG4baaaaWcpaqa % a8qacaaIYaaapaqaa8qacaaI1aaaniabgUIiYdGccqGH9aqpciGGSb % GaaiOBaiaadggaaaa!5C64! \int\limits_2^5 {\frac{{{\rm{d}}x}}{x}} = \ln a\). Tìm a
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Lời giải:
Báo saiTa có \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqaMHovLHfij5gC1rhimfMBNvxyNvga7XvAUrhxSL % wBPr3CFTNm951E103ECzMCHn2ECrxz4r3EK1hE9ThE91xpCXMBGegx % mvMz0jxANHgDHjNCVDhiCXwzMrNlGWfBUbcxSvMz0Xhi4bcxYL2zOr % hFGWLCPDgA0X3x7jtFETxn91dxS5giHXftLzgDYL2zOrxyYj3B3bcx % S5gi10cxS5giY0dxS5giHXftLzgDYL2zOrxyYj3B3bcxS5giCzMCHn % 2E103EY0xpCXMBGegxmvMz0jxANHgDHjNCVDhiH1dxMjxyJTxn9TNm % 91hatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTf % MBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqi % VCI8FfYJH8YrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfeaY- % biLkVcLq-JHqpepeea0-as0Fb9pgeaYRXxe9vr0-vr0-vqpWqaaeaa % biGaciaacaqabeaadaqaaqaaaOqaaabaaaaaaaaapeWaa8qCa8aaba % Wdbmaalaaapaqaa8qacaqGKbGaamiEaaWdaeaapeGaamiEaaaaaSWd % aeaapeGaaGOmaaWdaeaapeGaaGynaaqdcqGHRiI8aOGaeyypa0Jaci % iBaiaac6gacaWGHbGaeyi1HS9aaqGaa8aabaWdbiGacYgacaGGUbWa % aqWaa8aabaWdbiaadIhaaiaawEa7caGLiWoaaiaawIa7a8aadaqhaa % WcbaWdbiaaikdaa8aabaWdbiaaiwdaaaGccqGH9aqpciGGSbGaaiOB % aiaadggacqGHuhY2ciGGSbGaaiOBaiaaiwdacqGHsislciGGSbGaai % OBaiaaikdacqGH9aqpciGGSbGaaiOBaiaadggacqGHuhY2ciGGSbGa % aiOBamaalaaapaqaa8qacaaI1aaapaqaa8qacaaIYaaaaiabg2da9i % GacYgacaGGUbGaamyyaiabgsDiBlaadggacqGH9aqpdaWcaaWdaeaa % peGaaGynaaWdaeaapeGaaGOmaaaaaaa!C635! \int\limits_2^5 {\frac{{{\rm{d}}x}}{x}} = \ln a \Leftrightarrow \left. {\ln \left| x \right|} \right|_2^5 = \ln a \Leftrightarrow \ln 5 - \ln 2 = \ln a \Leftrightarrow \ln \frac{5}{2} = \ln a \Leftrightarrow a = \frac{5}{2}\)