Friday

January 30, 2015

January 30, 2015

Posted by **jess** on Tuesday, June 12, 2012 at 1:52pm.

- math equations -
**Steve**, Tuesday, June 12, 2012 at 2:20pmhuh? there's nothing to solve. Just evaluate log3 15.

Now, you probably don't have a log-base-3 key on your calculator, so you have to use what you do have: ln

x = ln15/ln3

How does that work? By definition,

3^log3 15 = 15

ln(3^log3 15) = ln15

now, ln(3^p) = p*ln3, so we have

log3 15 * ln3 = ln15

log3 15 = ln15/ln3

**Answer this Question**

**Related Questions**

math - Solve for x in the following equations. (4 marks) log3(x - 5) + log3(x + ...

ALGEBRA 1 - Lesson 3 Assignment .Explain the differences between solving these ...

Algebra 1 - Lesson 3 Assignment .Explain the differences between solving these ...

Math - Solve the logarithmic equation. Express your solutions in exact form only...

maths pls help - 1. Solve the following simultaneous equations: log2 xy = 7 log2...

Math - (I have two questions) 1. Solve for x without a calculator: log3(x^2)=...

Math - Solve for x. log3(x+7)=2-log3(x-1) Write the exact answer using base-10 ...

math (pre-calc) - Solve for x: 1. 3^2x+3^x+1-4=0 2. log3(x=12)+log3(x+4)=2 3. ...

Algebra 1 - Explain the differences between solving these two equations: Brake ...

Algebra 1 - Explain the differences between solving these two equations: •log3(x...