Pre Calculus 12

posted by .

Laws of Logarithms

Evaluate: without using a calculator, except for the first one. The 5.6 is supposed to be subscript, but i don't know how to make it small.



Do I multiply this by four or something? both of the logs?

  • Pre Calculus 12 -

    One major rule of logs, used when changing bases is

    log ba
    = log a / log b

    so 4 log 5.684
    = 4(log 84 / log 5.6)
    = 4(1.924279.../.74818..) = 10.2877

  • Pre Calculus 12 -

    Thanks very much Reiny :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Precalculus

    I'm studying for my precalc exam and have completed 42 practice problems. I have 3 I need to answer that I can't. Please help. What is the base of the function G(x) = log subscript b x if it's graph has points (16,4)?
  2. Math

    solve for x without using a calculator: log5(3^x) = log25(9^(1-2x)) I don't know how to get rid of the logs for this one. Help?
  3. Calculus

    Solve for x. Don't do the work using algebra and don't use a calculator. The Laws of Logarithms will be helpful. ln(x^2 - 1)= 3
  4. Pre-Calculus

    Laws of Logarithms Without using a calculator use the change of base rule to evaluate 1. a) log(subscript8)32(hint use base 2) =log(subscript2 32)/log(subscript2 8) = 5/3 b) log(subscript36)1296. This one doesnt even give you a hint, …
  5. Pre Calculus 12

    Laws of logarithms evualuat using change of base rule log(√8)16 ^the square root 8 is supposed to be subscript. the answer i got was 8/3, not sure if that is right
  6. Math- logarithms

    How I find which is larger without using a calculator: log4 17 or log5 24?
  7. mathematics

    Given that log5 3=0.683 and log5 7=1.209.without using calculator,evaluate (a) log5 1.4 b)log7 75 c) log3 125
  8. Logarithm help

    using logarithms to solve exponential equations. 5^1+x = 2^1-x I need exact numbers. I did one on my own already. 5^x-1 = 9 5^x-1 = 9 log(5^x-1) = log9 (log5)(x-1) = log9 x-1 = (log9/log5) x= (log9/log5)-1 x = 2.3652
  9. math: pre-calculus

    Evaluate the expression without using a calculator. Unless stated otherwise, all letters represent positive numbers. e^(ln√x+5)
  10. Pre Calculus

    Evaluate the function f(x) = log3 x at x =1/27 without using a calculator a. –4 b. –2 c. 1/27 d. –3 e. 27

More Similar Questions