Math Problem Statement

Solve the following elementary exponential equation.

2^(3x−8)=1/4

Solution

To solve the equation 23x8=142^{3x-8} = \frac{1}{4}, follow these steps:

Step 1: Rewrite the equation in exponential form.

We know that 14=22\frac{1}{4} = 2^{-2}, so we can rewrite the equation as: 23x8=222^{3x-8} = 2^{-2}

Step 2: Equate the exponents.

Since the bases are the same, the exponents must be equal: 3x8=23x - 8 = -2

Step 3: Solve for xx.

  1. Add 8 to both sides: 3x=63x = 6

  2. Divide both sides by 3: x=2x = 2

Final Solution:

x=2x = 2

Let me know if you'd like a detailed explanation of any step or have further questions!

Follow-Up Questions:

  1. How would the solution change if the base was different (e.g., 33x83^{3x-8})?
  2. Can you solve a similar equation 23x5=82^{3x - 5} = 8?
  3. What happens if the right-hand side of the equation was 00?
  4. How does this method work for non-integer bases, e.g., e3x8=1/e2e^{3x-8} = 1/e^2?
  5. Can this method be generalized for logarithmic equations?

Tip:

Always check whether the base and exponent format allow simplifications before proceeding with solving equations.

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Math Problem Analysis

Mathematical Concepts

Exponential Equations
Exponent Rules
Algebra

Formulas

2^a = 2^b → a = b

Theorems

Exponentiation and properties of exponents

Suitable Grade Level

Grades 8-10