Which of the following is equivalent to log [125] 25 ?

1.076

3/2

2/3

2/5

Question

Which of the following is equivalent to log [125] 25 ?

1.076

3/2

2/3

2/5

mertsj · Answer

Is 125 the base?

lgbasallote · Answer

quick question...have you tried the calculator?

zepp · Answer

Do you know the change of base formula?

mertsj · Answer

$$\log_{125}25=x $$
Put it in exponential form.

mertsj · Answer

Then rewrite 125 and 25 as powers of 5.

anonymous · Answer

can cheat with change of base. 
elsewise since 
$$5^2=25$$ and $$5^3=125$$ 
$$125^{\frac{2}{3}}=\sqrt[3]{125}^2=5^2=25$$ so your answer is 
$$\frac{2}{3}$$

anonymous · Answer

Thanks:)

lgbasallote · Answer

if you're gonna cheat then might as well do $$\log 25 \div \log 125$$ @satellite73

zepp · Answer

Must read @lgbasallote's tutorial

anonymous · Answer

zacty what i meant. got a calculator, all you need is change of base and be done

anonymous · Answer

course your calculator will give you something like $.666667$

anonymous · Answer

i know how to do it, i just dont want to... And i dont mean to be rude but if you dont want to help why comment?

zepp · Answer

@satellite73 Math -> Frac! :D http://puu.sh/uN3R