How do you evaluate #log_9 729#?
2 Answers
Aug 7, 2016
When I write
Explanation:
Typically we use sensible bases for logarithms such as
But with your problem we have
And thus if
Clearly
Aug 7, 2016
Explanation:
In log form, the question being asked is :
"To what power must 9 be raised to equal 729?"
It really is a huge advantage to know all the powers up to 1,000 by heart.
In this case you will recognize
Therefore
Without knowing this, you will have to do the whole log route...
#xlog9 = log729+
It really is easier to just learn them!