Question

calcule os seguintes logaritmos:
a) log2 32     b) log3 81
C)log25 125              

Answer 1

a)
$log_{2}(32) = x$
${2}^{x} = 32$
${2}^{x} = {2}^{5 } \\ x = 5$
b)
$log_{3}(81 ) \\ {3}^{x} = 81 \\ {3}^{x} = {3}^{4} \\ x = 4$
c)
$log_{25}(125) = x \\ {25}^{x} = 125 \\ { {5}^{2} }^{x} = {5}^{3} \\ 2x = 3 \\ x = \frac{3}{2}$