search points attachment profile arrow left arrow right star heart verified symbols equation arrow-down question mark check menu accountancyadministrationagriculturalalgebraallarabicartart_musicbelarusbelarus_altbiologybusinesscatalachemistrychineseeconomicsegzamenglishentrepreneurshipenvironmentethicseuskarafirst_aidfrenchgalegogeographygeologygeometrygermangrammarhealthhistoryindia_langindonesian_langinformaticsitalianjapanesekazachkazach_altkoreanlanguagelatinlawlife_scienceliteraturelogicmathematicsmusicnigerian_langother_languagesotherspedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligionrpa_langrussianrussian_altsciencesecurityskillssocial_sciencesociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation accountancyadministrationagriculturalalgebraall_1arabicartart_music_2belarusbelarus_altbiologybusiness_2catalachemistry_1chineseeconomicsexam_3englishentrepreneurshipenvironment_2ethicseuskarasecurity_1frenchgalegogeography_4geology_4geometrygermangrammarhealthhistoryindia-langindonesian-langinformaticsitalianjapanesekazachAsset 230koreanlanguagelatinlawlife-scienceliteraturelogic_2mathematicsmusicnigerian-langotherlanguagesother_1pedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligion_1rpa-langrussianrussian_altsciencesecurity_3_mskills_1allsocial_science_5_msociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation
Автор - rostikg

Помогите решить показательное уравнение!

Ответ

Автор - Trover

3^{2x^2}-12cdot2^{x^2}+27=0\left(3^{x^2}right)^2-12cdot3^{x^2}+27=0\3^{x^2}=t,;t>0\\t^2-12t+27=0\D=144-4cdot1cdot27=144-108=36\t_{1,2}=frac{12pm6}2\t_1=3,;t_2=9\\3^{x^2}=3Rightarrow x^2=1Rightarrow x=pm1\\3^{x^2}=9Rightarrow x^2=2Rightarrow x=pmsqrt2

Ответы и объяснения

По всем вопросам пишите на - vashurokk@rambler.ru
Сайт znanija.net не имеет отношения к другим сайтам и не является официальным сайтом компании.