As propriedades operatórias dos logaritmos baseiam-se nas propriedades da potenciação e são particularmente úteis para calcular o resultado de um logaritmo. Considerando que ln left parenthesis 2 right parenthesis approximately equal to space 0 comma 69 comma ln left parenthesis 3 right parenthesis approximately equal to 1 comma 10 space e space ln left parenthesis 5 right parenthesis approximately equal to 1 comma 61, o valor de é ln left parenthesis 30 right parenthesis space aproximadamente:
a.
3,40
b.
1,22
c.
1,09
d.
2,30
e.
2,71
1,4 pontos
PERGUNTA 2
Seja uma função f colon space A rightwards arrow B. Denominamos função inversa de f, indicada por f to the power of negative 1 end exponent comma à função bijetora f to the power of negative 1 end exponent colon B rightwards arrow A.
Considere a função f colon space straight real numbers rightwards arrow straight real numbers comma space f left parenthesis x right parenthesis space equals space 5 x space minus space 1. Assinale a alternativa que corretamente apresenta a sua função inversa f to the power of negative 1 end exponent colon
a.
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals fraction numerator x plus 1 over denominator 5 end fraction
b.
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals fraction numerator negative x plus 5 over denominator 2 end fraction
c.
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals 5 x minus 1
d.
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals fraction numerator 1 over denominator 5 x minus 1 end fraction
e.
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals left parenthesis x plus 5 right parenthesis to the power of negative 2 end exponent