Mastering the Mysteries of Logarithms: Solving for x in a Tricky Equation

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In summary, logarithms are mathematical functions that help us solve complex equations involving exponents in a simpler and more efficient way. They are used when an unknown variable is both the base and power of another number. The most commonly used types of logarithms are natural and common logarithms, with different bases. To solve for x in a logarithmic equation, the steps include isolating the logarithm, taking the logarithm of both sides, simplifying using logarithm rules, isolating the variable, and using exponent rules. Common mistakes to avoid when solving logarithmic equations include forgetting to apply logarithm rules, mixing up the order of operations, using the wrong base, and not checking for extraneous solutions.
  • #1
DeanBH
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i've got a logashizm problem to this point

the log is base 2log (x(x+3)^2 / (4x+2)) = 1

apparently x(x+3)^2 / (4x+2) = 2

no idea why, halp?

thxgod damn it, nvm

2^1 = (x(x+3)^2 / (4x+2)) when you take the damn log out.
 
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  • #2
exactly
 
  • #3


I can understand your frustration with this logashizm problem. Logarithms can be tricky and require a thorough understanding of their properties and rules to solve equations like this. In this case, the log is base 2, which means we are working with binary logarithms.

To solve this equation, we first need to understand that taking the log of both sides of an equation cancels out the exponent. Therefore, we can rewrite the equation as 2^1 = x(x+3)^2 / (4x+2). This simplifies to 2 = x(x+3)^2 / (4x+2).

To further simplify this equation, we can use the distributive property and expand (x+3)^2 to get 2 = (x^2 + 6x + 9) / (4x+2). We can then cross-multiply and solve for x to get x = 1 or x = -3.

I understand that this may seem confusing, but with practice and a deeper understanding of logarithms, you will be able to master these types of equations. Keep in mind the properties of logarithms, such as log(a*b) = log(a) + log(b) and log(a/b) = log(a) - log(b), and always check your answers by plugging them back into the original equation.

I hope this helps and encourages you to continue exploring the mysteries of logarithms. Good luck!
 

1. What are logarithms and why are they important?

Logarithms are mathematical functions that represent the relationship between numbers in an exponential equation. They are important because they allow us to solve complex equations involving exponents, such as growth and decay problems, in a simpler and more efficient way.

2. How do I know when to use logarithms to solve an equation?

You should use logarithms when you have an equation with an unknown variable in the exponent. This means that the variable is both the base and the power of another number. In these cases, taking the logarithm of both sides of the equation can help you solve for the unknown variable.

3. What are the different types of logarithms?

The most commonly used types of logarithms are natural logarithms (ln) and common logarithms (log). Natural logarithms have a base of e, which is approximately 2.718, while common logarithms have a base of 10. There are also other types of logarithms, such as binary and base-2 logarithms, but they are less frequently used.

4. What are the steps to solving for x in a logarithmic equation?

The steps to solving for x in a logarithmic equation are as follows:

  1. Isolate the logarithm on one side of the equation.
  2. Take the logarithm of both sides using the appropriate base.
  3. Apply logarithm rules to simplify the equation.
  4. Isolate the variable on one side of the equation.
  5. Use exponent rules to solve for the variable.

5. What are some common mistakes to avoid when solving logarithmic equations?

Some common mistakes to avoid when solving logarithmic equations include:

  • Forgetting to apply logarithm rules to simplify the equation.
  • Mixing up the order of operations when solving for the variable.
  • Using the wrong base when taking logarithms of both sides.
  • Forgetting to check for extraneous solutions after solving the equation.

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