Thursday

December 18, 2014

December 18, 2014

Posted by **Rebekah** on Wednesday, November 21, 2012 at 6:32am.

1. log base 3 of 8 times log base 8 of 9. I started by changing both bases to 10 but dont know what to do from there.

2. e ^ log base e^2^9. I hope that isnt confusing. My teacher said we are suppose to get the bases all e, but how because there is only 1 log.

Suppose that ln 2= a and ln 3= b. Use the properties of logs to write each in terms of a and b

1. ln .5

thanks

- precalc help -
**Steve**, Wednesday, November 21, 2012 at 10:34amrecall that

log_a(n) = log_b(n)/log_a(b)

log_a(n) = 1/log_n(a)

1.

log_3(8) * log_8(9)

= 1/log_8(3) * log_8(9)

= log_3(9)

= 2

2.

recall that

e^ln(n) = n, so

e^ln(2^9) = 2^9 = 512

3.

.5 = 1/2, so

ln .5 = ln(2^-1) = -ln(2) = -a

**Answer this Question**

**Related Questions**

Precalc - 1. 1/3log base 8 of (x+1)=2log base 8 of 3-(2/3)log base 8 of (x+1) 2...

Algebra 2 - -Explain the difference between log base b (mn) and ( log base b of ...

Algebra - How can you find log base 3 of 242/5 using the given information ...

Advanced Functions/ Precalculus Log - 1. Evaluate 4^(log base4 64) + 10^(log100...

Math - Bases - What is 12 base 5? Would you just divide 12 by five and get 2 (...

math-logs - 1. logaB = 2 and logbC = 4, evaluate logcA *the lowercase letters ...

algebra - Find value of log (base 8)log (base 2) log (base 3)log (base 3) (27)^3...

check! - here is the question: log5(x-4)= log7x solve for x. These are just base...

math - mathematically Evaluate without using tables 2 log base 10 raised 2 power...

Precalculus - I'm studying for my precalc exam and have completed 42 practice ...