Bootcamp Question

[dentistaporfavor]

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If a= log2(72) and b=log2(3), which of the following is equal to a - 2b?

I understand the bootcamp explanation for how to solve this problem but I don't understand why it can't be 72/9=8?

Because of the log identity log (A/B)=log(A)-log(B)
The answer is 3 by the way.

 

[smilesandwaves]

I believe you still have to take the log of the function, so you need to do log2(8)=3

 

[dentistaporfavor]

haha... WOW i swear... doing so many problems every day does something to your head ... thank you!!!