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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!news.mixmin.net!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!cleanfeed1-b.proxad.net!nnrp2-2.free.fr!not-for-mail Date: Fri, 3 Jun 2022 19:03:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: Logarithme neperien ? Content-Language: fr Newsgroups: fr.sci.maths References: <0eec28e3-043e-4d43-8218-ef5d71eeec9dn@googlegroups.com> <6288d4cf$0$18407$426a34cc@news.free.fr> <0860d1cb-ec71-47a7-a5a6-2d2ae8a20434n@googlegroups.com> <629225cd$0$22276$426a74cc@news.free.fr> From: robby In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Lines: 17 Message-ID: <629a3edf$0$18399$426a74cc@news.free.fr> Organization: Guest of ProXad - France NNTP-Posting-Date: 03 Jun 2022 19:03:27 CEST NNTP-Posting-Host: 91.168.150.105 X-Trace: 1654275807 news-2.free.fr 18399 91.168.150.105:47955 X-Complaints-To: abuse@proxad.net Bytes: 1670 Le 03/06/2022 à 16:30, philippe L a écrit : > Le samedi 28 mai 2022 à 15:38:22 UTC+2, robby a écrit : >> tu écoute de la musique via un haut parleur. >> tu multiplies par 2 l'intensité de l'ampli. >> >> → le son sera + fort de combien de dB ( décibels ) ? >> > 2X | x^2 ? hum, tu as demandé un exercice sur les logs. et un simple googling te rappelle la definition de décibel: https://fr.wikipedia.org/wiki/D%C3%A9cibel -- Fabrice