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Write [tex]$\log _3 12$[/tex] in terms of natural logarithms using the change-of-base theorem.

Sagot :

To find [tex]\(\log_3{12}\)[/tex] in terms of natural logarithms, we can use the change-of-base theorem. The change-of-base theorem states that for any positive numbers [tex]\(a\)[/tex], [tex]\(b\)[/tex], and [tex]\(c\)[/tex] where [tex]\(a \neq 1\)[/tex] and [tex]\(b \neq 1\)[/tex],

[tex]\[ \log_b{a} = \frac{\log_c{a}}{\log_c{b}} \][/tex]

In this case, we want to express [tex]\(\log_3{12}\)[/tex] using natural logarithms, which use the base [tex]\(e\)[/tex] (denoted as [tex]\(\ln\)[/tex]).

According to the change-of-base theorem, we have:

[tex]\[ \log_3{12} = \frac{\ln{12}}{\ln{3}} \][/tex]

We then compute each of the natural logarithms separately:

1. Compute [tex]\(\ln{12}\)[/tex]
2. Compute [tex]\(\ln{3}\)[/tex]

Finally, divide the natural logarithm of 12 by the natural logarithm of 3:

[tex]\[ \log_3{12} = \frac{\ln{12}}{\ln{3}} \approx \frac{2.4849066497880004}{1.0986122886681098} \approx 2.2618595071429146 \][/tex]

Thus, in terms of natural logarithms,

[tex]\[ \log_3{12} \approx 2.26 \][/tex]