Logarithmic Equation with x on both sides

To actually find an approximate numerical solution, you can use methods such as Newton's method or the bisection method. In summary, the conversation discusses solving an exponential equation with x on both sides and mentions methods for finding an approximate numerical solution.
  • #1
Negima
2
0
Exponential Equation with x on both sides

Homework Statement



18x^2=6e^(2x)

Homework Equations


I don't know any for the step I got stuck on.


The Attempt at a Solution


3x^2=e^2x
ln3x^2=lne^2x
2ln3x=2x
ln3x=x
 
Last edited:
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  • #2
Please start using more parentheses, ok? If you mean 3*x^2=e^(2x), then taking logs gives you log(3)+2*log(x)=2*x. The left side is not 2ln3x, whatever that means. You can't solve that using elementary functions. You can prove a solution exists, and you can solve it numerically, but that's about it.
 
  • #3
Thank you for your reply! And sorry about the lack of parenthesis.

By solving it numerically, do you mean guess and checking values for x? Or actually solving for x?
 
  • #4
Negima said:
Thank you for your reply! And sorry about the lack of parenthesis.

By solving it numerically, do you mean guess and checking values for x? Or actually solving for x?

Well yes you can guess values using the intermediate value theorem and show that a solution exists.
 

1. What is a logarithmic equation with x on both sides?

A logarithmic equation with x on both sides is an equation in which both sides contain a logarithm with x as the argument. It is written in the form loga(x) = logb(x), where a and b are constants and x is the variable.

2. What is the general solution to a logarithmic equation with x on both sides?

The general solution to a logarithmic equation with x on both sides is x = c, where c is a constant. This means that any value of x that satisfies the equation will be equal to this constant value.

3. How do you solve a logarithmic equation with x on both sides?

To solve a logarithmic equation with x on both sides, you can use the property of logarithms that states loga(b) = c if and only if ac = b. This means that you can raise both sides of the equation to the power of the base of the logarithm to eliminate the logarithms and solve for x.

4. Can a logarithmic equation with x on both sides have more than one solution?

Yes, a logarithmic equation with x on both sides can have multiple solutions. This is because the logarithm function is not one-to-one, meaning that multiple inputs can result in the same output. Therefore, you may need to check your solution to ensure that it satisfies the original equation.

5. What is the importance of logarithmic equations with x on both sides?

Logarithmic equations with x on both sides are important in various fields of science, such as physics, chemistry, and biology. They are used to model relationships between variables that change at a constant rate, and they can help solve complex problems involving exponential growth or decay. Additionally, they are essential in understanding natural phenomena and making predictions about future outcomes.

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