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Mathematics 13 Online
OpenStudy (vera_ewing):

Evaluate log4 16.

OpenStudy (amorfide):

\[\log_{a}(b)=C\] \[a^{c}=b\]

OpenStudy (vera_ewing):

\[\log_{4} 16\]

OpenStudy (amorfide):

this gives you an expression of \[4^{x}=16\]

OpenStudy (amorfide):

no

OpenStudy (amorfide):

if you have log base 4 of 16= X you want to know what power 4 is raised to to get 16

OpenStudy (amorfide):

no

OpenStudy (amorfide):

2

OpenStudy (amorfide):

4 squared is 16

OpenStudy (vera_ewing):

Oh ok thanks

OpenStudy (amorfide):

similarly

OpenStudy (jdoe0001):

\(\bf log_{\color{brown}{ a}}{\color{blue}{ b}}=y\iff {\color{brown}{ a}}^y={\color{blue}{ b}} \\ \quad \\ \quad \\ log_{\color{brown}{ 4}}{\color{blue}{ 16}}\implies ? \)

OpenStudy (amorfide):

you could also do...

OpenStudy (amorfide):

\[4^{x}=16\] take log base 4 on both sides \[\log_{4}4^{x}=\log_{4}16\] assuming you know your rules of logarithms \[xlog_{4}4=\log_{4}4 + \log_{4}4\] you should know \[\log_{4}4=1\] so you end up with x=1+1

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