log 𝑥 + log(𝑥 − 1) = log(3𝑥 + 2)
Question
log 𝑥 + log(𝑥 − 1) = log(3𝑥 + 2)
Solution
Sure, let's solve the equation step by step.
The equation is: log 𝑥 + log(𝑥 − 1) = log(3𝑥 + 2)
Step 1: Use the property of logarithms that states log(a) + log(b) = log(ab). So, the left side of the equation becomes log[x(x-1)].
So, the equation now is: log[x*(x-1)] = log(3𝑥 + 2)
Step 2: If log(a) = log(b), then a = b. So, we can equate x*(x-1) and 3x+2.
So, the equation now is: x*(x-1) = 3x + 2
Step 3: Simplify the equation.
x^2 - x = 3x + 2
Step 4: Rearrange the equation to one side to set it to zero.
x^2 - 4x - 2 = 0
Step 5: Solve the quadratic equation using the quadratic formula x = [-b ± sqrt(b^2 - 4ac)] / (2a).
Here, a = 1, b = -4, and c = -2.
So, the solutions for x are: x = [4 ± sqrt((-4)^2 - 41(-2))] / (2*1)
Solving this gives the roots of the equation, which are the solutions for x.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.