I need help solving these logarithmic equations, please.
a) x=log(100) (10)
b) x= (12)log (12) (5)
I put the numbers in ()

Question

I need help solving these logarithmic equations, please.
a) x=log(100)   (10)
b) x= (12)log (12) (5)
I put the numbers in ()

dumbcow · Answer

are these correct
$$x = \log_{100}10  $$
$$x=12\log_{12}5 $$

anonymous · Answer

Yess. I didnt know how to write them on here.

dumbcow · Answer

do you need to put them in exponential form or just need a numerical answer?

anonymous · Answer

Just the numerical answer

anonymous · Answer

I have another one but Im not sure how to write it either....its log 2 2 sqrt 2 over 5?

dumbcow · Answer

ok use the change of base formula
logb(x) = ln(x)/ln(b)
ln is natural log, use your calculator

anonymous · Answer

I know this sounds really, really dumb. But my teacher has not taught us with the caculator and Im not sure how to use it. Im sure thats what we will learn today in class. Thanks

dumbcow · Answer

well depending on your calculator its not that bad.
for the first one you would press the ln button then 10 and divide by ln(100)