A) 7
9
C) 5
D) 2
E) 3
Observe:
Solução
lim.. .[ log₃ ( 2x + 1 ) ] = log₃ ( 2.4 + 1 ) = log₃ ( 2.4 + 1 ) = log₃ ( 8 + 1 ) = log₃ 9 = 2
x→4
Obs. log₃ 9 = x ⇒ 9 = 3ˣ ⇒ 3² = 3ˣ ⇒ x = 2
Portanto;
R ─────► D) 2.
██████████████████ █████████████████ █████████████████
*********************************** . . . *********************************. . . ****************
Por favor não deixe a sua pergunta cair em votação e cuidado com ´´alguns`` usuários que costumam pegar carona nas minhas respostas. Agradeço desde já!!!
*******************************… . .********************************. . . *********************
Piauí - Teresina , 19/09/2012
Hora 16 : 54
Temperatura 37º
Abraços !!!!!!!!!!
Fonte(s)
Minha...
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…….\llllllllllll,-~*…………………)_-\..*`*;.…
……..\,-*`¯,*`)…………,-~*`~.………….../
……...|/.../…/~,…...-~*,-~*`;……………./.\
……../.../…/…/..,-,..*~,.`*~*…………….*...…
…….|.../…/…/.*`...\...……………………)….)¯`~,
…….|./…/…./…….)……,.)`*~-,……….../….|..)…
……/./.../…,*`-,…..`-,…*`….,---…...\…./…
…...(……….)`*~-,….`*`.,-~*.,-*……|…/.…/……
…….*-,…….`*-,...`~,..``.,,,-*……….|.,*.…
……….*,………`-,…)-,…………..,-*`...,-*….(`-,…
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Comments
Observe:
Solução
lim.. .[ log₃ ( 2x + 1 ) ] = log₃ ( 2.4 + 1 ) = log₃ ( 2.4 + 1 ) = log₃ ( 8 + 1 ) = log₃ 9 = 2
x→4
Obs. log₃ 9 = x ⇒ 9 = 3ˣ ⇒ 3² = 3ˣ ⇒ x = 2
Portanto;
R ─────► D) 2.
██████████████████ █████████████████ █████████████████
*********************************** . . . *********************************. . . ****************
Por favor não deixe a sua pergunta cair em votação e cuidado com ´´alguns`` usuários que costumam pegar carona nas minhas respostas. Agradeço desde já!!!
*******************************… . .********************************. . . *********************
██████████████████ █████████████████ █████████████████
Piauí - Teresina , 19/09/2012
Hora 16 : 54
Temperatura 37º
Abraços !!!!!!!!!!
Fonte(s)
Minha...
………………..,-~*’`¯lllllll`*~,
…………..,-~*`lllllllllllllllllllllllllll…
………,-~*lllllllllllllllllllllllllllllll…
……,-*lllllllllllllllllllllllllllllllll…
….;*`lllllllllllllllllllllllllll,-~*~-…
…..\lllllllllllllllllllllllllll/………\;;…
…...\lllllllllllllllllllll,-*………..`~-~…
…….\llllllllllll,-~*…………………)_-\..*`*;.…
……..\,-*`¯,*`)…………,-~*`~.………….../
……...|/.../…/~,…...-~*,-~*`;……………./.\
……../.../…/…/..,-,..*~,.`*~*…………….*...…
…….|.../…/…/.*`...\...……………………)….)¯`~,
…….|./…/…./…….)……,.)`*~-,……….../….|..)…
……/./.../…,*`-,…..`-,…*`….,---…...\…./…
…...(……….)`*~-,….`*`.,-~*.,-*……|…/.…/……
…….*-,…….`*-,...`~,..``.,,,-*……….|.,*.…
……….*,………`-,…)-,…………..,-*`...,-*….(`-,…
..............f`-,………`-,/…*-,___,,-~*……