5 Answers | Add Yours
We can first rewrite 81 as an exponential with base 3.
We know that 3*3*3*3 = 81. So, 81 = 3^4.
We will have:
3^2m = 3^4
Using natrual logarithm on both sides.
ln3^2m = ln3^4
Use the property: lna^b = blna.
2mln3 = 4ln3
Divide both sides by ln3.
2m = 4
Divide both sides by 2.
m = 2
Factor above expression by `A^2-B^2=(A-B)(A+B)`
`because 3^m+9!=0AA m`
using natural log:
`2m ln3= 4ln 3`
using natural log
this is not how you do it, sorry but my teacher told me to use natural log or log base.
We’ve answered 317,573 questions. We can answer yours, too.Ask a question