Dado log3 (2x+1), a alternativa que indica o lim -> 4 [log3 (2x+1)] é:?

A) 7

B) 9

C) 5

D) 2

E) 3

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.

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    Piauí - Teresina , 19/09/2012

    Hora 16 : 54

    Temperatura 37º

    Abraços !!!!!!!!!!

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