Math Problem Statement

If 3^(2x+1) = 3^(2x) + 162, find the value of x.

Solution

The equation in the image is:

32x+1=32x+1623^{2x+1} = 3^{2x} + 162

Steps to solve for xx:

  1. Start by rewriting the left side: 32x+1=32x33^{2x+1} = 3^{2x} \cdot 3 So, the equation becomes: 32x3=32x+1623^{2x} \cdot 3 = 3^{2x} + 162

  2. Let y=32xy = 3^{2x}, to simplify the equation: 3y=y+1623y = y + 162

  3. Rearrange the equation: 3yy=1623y - y = 162 Simplifying: 2y=1622y = 162 Divide both sides by 2: y=81y = 81

  4. Since y=32xy = 3^{2x}, we now have: 32x=813^{2x} = 81 Rewrite 81 as 343^4: 32x=343^{2x} = 3^4

  5. Equate the exponents: 2x=42x = 4

  6. Solve for xx: x=42=2x = \frac{4}{2} = 2

Thus, the value of xx is:

2\boxed{2}

Would you like more details on any of the steps?

Related questions:

  1. How can we solve similar equations with different bases?
  2. What are the key properties of exponents that help in solving these types of equations?
  3. How would the solution change if the equation involved logarithms instead of exponents?
  4. What are some other methods to solve exponential equations when the exponents are not directly comparable?
  5. How can you apply these principles to solve equations involving both exponential and linear terms?

Tip:

When solving exponential equations, always look for ways to express terms with a common base to simplify comparisons between exponents.

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Math Problem Analysis

Mathematical Concepts

Exponential Equations
Algebra

Formulas

a^(m+n) = a^m * a^n
Isolate exponential terms to solve equations
Basic properties of exponents

Theorems

Exponent Properties
Equating Exponents

Suitable Grade Level

Grades 10-12