Math Problem Statement

2xlog₂-log₂x-log₂=2

Solution

We are given the equation:

2log2(x)log2(x)log2(2)=22 \cdot \log_2(x) - \log_2(x) - \log_2(2) = 2

Step 1: Simplify the equation.

First, recall that log2(2)=1\log_2(2) = 1, since 21=22^1 = 2. This simplifies the equation to:

2log2(x)log2(x)1=22 \cdot \log_2(x) - \log_2(x) - 1 = 2

Step 2: Combine like terms.

Next, combine the logarithmic terms:

(2log2(x)log2(x))1=2(2\log_2(x) - \log_2(x)) - 1 = 2

This simplifies to:

log2(x)1=2\log_2(x) - 1 = 2

Step 3: Solve for log2(x)\log_2(x).

Now add 1 to both sides:

log2(x)=3\log_2(x) = 3

Step 4: Solve for xx.

By the definition of a logarithm, x=23=8x = 2^3 = 8.

Final Answer:

x=8x = 8

Would you like more details on any step? Here are 5 questions to expand on this:

  1. How do logarithmic properties help simplify such equations?
  2. Why does log2(2)=1\log_2(2) = 1?
  3. Can we apply the same steps with different logarithmic bases?
  4. What other methods could be used to solve logarithmic equations?
  5. How does the logarithm change if there's a coefficient in front of it?

Tip: When solving logarithmic equations, always simplify constants like logb(b)=1\log_b(b) = 1 to make the equation easier to manage.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Algebraic Manipulation

Formulas

log_b(b) = 1
logarithmic subtraction and simplification

Theorems

Properties of logarithms

Suitable Grade Level

Grades 9-11