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Mathematics 7 Online
OpenStudy (study_buddy99):

tiny question regarding this log problem

OpenStudy (study_buddy99):

\[\log_4x+\log_44=5\log_42\]

OpenStudy (vishweshshrimali5):

Any idea how you are going to solve this?

OpenStudy (study_buddy99):

so I've gotten to this point: \[\log_44x4=5\log_42\]

OpenStudy (study_buddy99):

oops 4x*

OpenStudy (vishweshshrimali5):

Okay so we have.. \(\log_{4}(4x) = 5 \log_{4}2\)

OpenStudy (study_buddy99):

right, so then would you cancel the logs?

OpenStudy (vishweshshrimali5):

We are going to use one more property of log... \(a \log_{b} x = \log_{b} x^{a}\)

OpenStudy (vishweshshrimali5):

So our RHS will become?

OpenStudy (study_buddy99):

RHS?

OpenStudy (vishweshshrimali5):

Right hand side... i.e. \(5\log_{4} 2\)

OpenStudy (study_buddy99):

oh okay \[\log_42^5\]?

OpenStudy (vishweshshrimali5):

Great!

OpenStudy (vishweshshrimali5):

Now you can cancel log... :) So you will get... \(4x = 2^5\)

OpenStudy (study_buddy99):

then just solve?

OpenStudy (vishweshshrimali5):

Yeps :)

OpenStudy (study_buddy99):

x=8, thank you soo much!

OpenStudy (vishweshshrimali5):

Glad to be of help :)

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