Precalculus (Logarithmic)

Express each of the given question in logarithmic form.

i) e^2x = 15
ii) e^x-4 = 1/2
iii) a^x+1 = 5

Solutions
But am not sure if this is the way it should be done.

i) e^2x = 15
In (15) = 2x

ii) e^x-4 = 1/2
In (1/2) = x-4

iii) a^x+1 = 5
Log 5 with base "a" = x+1

  1. 👍 0
  2. 👎 0
  3. 👁 125
  1. ln e^(2x)
    = 2x = ln (15)

    next two lack parentheses so I do not know if you mean
    e^(x-4) or e^x - 4

    If you just left the parens out, the bunch are right

    1. 👍 0
    2. 👎 0
  2. Ok and thanks alot. But those two are without parentheses.

    1. 👍 0
    2. 👎 0
  3. oh, well if e^x - 4 = 1/2
    then e^x = 4.5
    x = ln 4.5

    but I wonder if that is what you mean
    your book does not need parentheses as it does not need ^ sign for expoinents.
    However on computer keyboard you must be more careful.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. pre-calculus-check over work

    1). change to exponential form: log2^256=8; 2^8=256 log0.0001=-4; 10^-4=0.0001 2). change to logarithmic form: 5^3=125; log5^125=3 4^-3=1/64; log4^1/64=-3 3). solve the equation: 3^(x-2)=27^(x+1) 3^(x-2)=(3^3)^(x+1)

  2. Math

    How do you write this equation in logarithmic form? 125^(4/3)=625

  3. Have I done this right

    write the equations in logarithmic form 216 = ^63 answer In(e^4.5) 49 = (1/7) ^-2 answer 2=log(3x)

  4. Algebra II

    Write the equation in logarithmic form. n^4/3=m Can someone explain how to do this?

  1. math

    express each of the following expressions in the form nPr or in the form nCr a. 27x26x25x24/4x3x2x1 b. 30x29x28x27x26

  2. Trigonometry

    Express each of the following as a single logarithmic expression. All exponents must be left in radical form: 1.) 2logx-3logy 2.) logx-logy+logz 3.) 1/3log5x+2/3log6x 4.) 2/3(logbase2 x - logbase2 y) I don't understand these

  3. Algebra with Applications

    write the equations in logarithmic form. 1. 216 =6^3 2. 25 =(1/5)^-2 3. a = b^c

  4. Algebra

    Write the equation of the line containing the given point and parallel to the given line. The equation of the line is y= ?... 1. Express your answer in the form y=mx+b. (7,8); x+7y=6 2. Express your answer in the form y=mx+b.

  1. Math

    Please help, thank you. Write the logarithmic equation in its equivalent exponential form. log 0.000001 = –6

  2. Pre-Calculus-check answers

    Express 5-2i in polar form. Express your answer in radians to the nearest hundreth. r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of -2/5+pi equals -18.7 Polar form=sqrt21 cis -18.7 Is this correct??

  3. Math---helpppp

    1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the

  4. math

    find an equation of the line having the given slope and containing the given point express your answer in the form x=a,y=b,ory=mx+b m=-2,(5,0) Do not understand this question.

You can view more similar questions or ask a new question.