Math Problem Statement

sqrt3 x (3^-3)^-2 = 27^x

Solution

Let's solve the equation step by step:

Given equation: 3×(33)2=27x\sqrt{3} \times \left(3^{-3}\right)^{-2} = 27^x

Step 1: Simplify (33)2\left(3^{-3}\right)^{-2}

First, simplify the expression inside the parentheses using the power of a power rule (am)n=am×n(a^m)^n = a^{m \times n}: (33)2=33×(2)=36\left(3^{-3}\right)^{-2} = 3^{-3 \times (-2)} = 3^6

So the equation becomes: 3×36=27x\sqrt{3} \times 3^6 = 27^x

Step 2: Convert 3\sqrt{3} to exponential form

3\sqrt{3} can be written as 31/23^{1/2}. Now, the equation is: 31/2×36=27x3^{1/2} \times 3^6 = 27^x

Step 3: Combine the exponents on the left side

Use the rule am×an=am+na^m \times a^n = a^{m+n} to combine the exponents on the left side: 31/2+6=27x3^{1/2 + 6} = 27^x

Simplify the exponent on the left side: 36.5=27x3^{6.5} = 27^x

Step 4: Express 27 as a power of 3

Since 27=3327 = 3^3, the equation becomes: 36.5=(33)x3^{6.5} = (3^3)^x

Step 5: Simplify the right side

Use the power of a power rule again: 36.5=33x3^{6.5} = 3^{3x}

Step 6: Equate the exponents

Since the bases are the same, you can equate the exponents: 6.5=3x6.5 = 3x

Step 7: Solve for xx

Divide both sides by 3: x=6.53=1362.1667x = \frac{6.5}{3} = \frac{13}{6} \approx 2.1667

So, the solution is: x=136x = \frac{13}{6}

Would you like any additional details or have any questions?


Here are 8 related questions:

  1. How do you solve equations involving square roots and exponents?
  2. What are the properties of exponents that are essential for solving exponential equations?
  3. How do you convert a radical expression into an exponential form?
  4. What would happen if the exponent on 27 were negative?
  5. Can you solve the equation 4×(22)3=16y4 \times (2^{-2})^{-3} = 16^y?
  6. What steps would you take to solve 2x=322^x = 32 for xx?
  7. How would you solve the equation 9x=819^x = 81 using properties of exponents?
  8. How does the equation change if you replace 3\sqrt{3} with 2\sqrt{2}?

Tip: When working with exponential equations, expressing all terms with the same base simplifies the problem significantly.

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Math Problem Analysis

Mathematical Concepts

Exponents
Square Roots
Power of a Power Rule

Formulas

Power of a Power Rule (a^m)^n = a^(m * n)

Theorems

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Suitable Grade Level

High School