Question 390257

The logarithm is just the opposite of exponentiation, just like dividing is of multiplication. 

When asking 'what is 21 divided by 7', you mean 'what number do I multiply 7 with to get 21'. 

you have:

 {{{y=log(base 3)243}}}, then 

when asking 'what is {{{3log243{{{', you mean '{{{3}}} to the {{{power}}} what number equals {{{243}}}?' 

Answer: {{{3^5 = 3*3*3*3*3 = 9*27 = 243}}}

so, the answer is  {{{5}}}