Solve the Equation: 2log(x+4) = 1 | Step-by-Step Solution
Question
Calculate X:
2log(x+4)=1
Video Solution
Solution Steps
00:00Find X
00:03We'll use the logarithm of power formula, and move the 2 to the logarithm
00:13A logarithm without a base is a logarithm with base 10
00:30We'll use the definition of logarithm to find the solution
00:50We'll expand brackets using short multiplication formulas
00:55Let's arrange the equation
01:05We'll use the roots formula to find possible solutions
01:15Let's calculate and solve
02:05And this is the solution to the question
Step-by-Step Solution
To solve the equation 2log(x+4)=1, we follow these steps:
Step 1: Divide both sides by 2 to simplify the equation.
Step 2: Apply the logarithm property to rewrite the equation.
Step 3: Convert the logarithmic equation into an exponential equation.
Step 4: Solve the resulting equation for x.
Let's work through the steps:
Step 1: Start by dividing both sides of the equation by 2:
log(x+4)=21
Step 2: Translate the logarithmic equation to its exponential form. Recall that logb(A)=C implies bC=A. Here, the base is 10 (since it's a common logarithm when the base is not specified):
x+4=1021
Step 3: Simplify 1021 which is the square root of 10: