Nghiệm của phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqaM5cvLHfij5gC1rhimfMBNvxyNvga7TNm951EYG % xlX0xFTWLzYf2y7ftF7HtF9adatCvAUfeBSjuyZL2yd9gzLbvyNv2C % aerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLD % harqqtubsr4rNCHbGeaGqiVCI8FfYJH8YrFfeuY-Hhbbf9v8qqaqFr % 0xc9pk0xbba9q8WqFfeaY-biLkVcLq-JHqpepeea0-as0Fb9pgeaYR % Xxe9vr0-vr0-vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaaba % aaaaaaaapeGaaGOma8aadaahaaWcbeqaa8qacaaIYaGaamiEaiabgk % HiTiaaigdaaaGccqGHsisldaWcaaWdaeaapeGaaGymaaWdaeaapeGa % aGioaaaacqGH9aqpcaaIWaaaaa!4F78! {2^{2x - 1}} - \frac{1}{8} = 0\) là
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Lời giải:
Báo saiTa có \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqaMLgvLHfij5gC1rhimfMBNvxyNvga7TNm951EYG % xlX0xFTWLzYf2y7ftF7HtF9adxmvMz0jxANHgDHjNCVDhi7TNm951E % YGxlX0xF9S3EY0Nx71Ym91hxmvMz0jxANHgDHjNCVDhi41tlXaWexL % MBbXgBcf2CPn2qVrwzqf2zLnharuavP1wzZbItLDhis9wBH5garmWu % 51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYlNi-xH8 % yiVC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9vqaqpepm0xbbG8FasPYRqj % 0-yi0dXdbba9pGe9xq-JbbG8A8frFve9Fve9Ff0dmeaabaqaciGaca % GaaeqabaWaaeaaeaaakeaaqaaaaaaaaaWdbiaaikdapaWaaWbaaSqa % beaapeGaaGOmaiaadIhacqGHsislcaaIXaaaaOGaeyOeI0YaaSaaa8 % aabaWdbiaaigdaa8aabaWdbiaaiIdaaaGaeyypa0JaaGimaiabgsDi % BlaaikdapaWaaWbaaSqabeaapeGaaGOmaiaadIhacqGHsislcaaIXa % aaaOGaeyypa0JaaGOma8aadaahaaWcbeqaa8qacqGHsislcaaIZaaa % aOGaeyi1HSTaamiEaiabg2da9iabgkHiTiaaigdaaaa!7693! {2^{2x - 1}} - \frac{1}{8} = 0 \Leftrightarrow {2^{2x - 1}} = {2^{ - 3}} \Leftrightarrow x = - 1\)
Đề thi thử tốt nghiệp THPT QG môn Toán năm 2020
Tuyển chọn số 3