Math Problem Statement

Solve the equation 2^(3x−1) = 36 for x.

Solution

To solve the equation 2(3x1)=362^{(3x - 1)} = 36, follow these steps:

Step 1: Take the natural logarithm of both sides

Applying the natural logarithm to both sides of the equation helps bring the exponent down: ln(2(3x1))=ln(36)\ln(2^{(3x - 1)}) = \ln(36) Using the logarithmic property ln(ab)=bln(a)\ln(a^b) = b \ln(a), this becomes: (3x1)ln(2)=ln(36)(3x - 1) \ln(2) = \ln(36)

Step 2: Solve for 3x13x - 1

Now, isolate 3x13x - 1: 3x1=ln(36)ln(2)3x - 1 = \frac{\ln(36)}{\ln(2)} We can calculate ln(36)ln(2)\frac{\ln(36)}{\ln(2)}: ln(36)3.5835andln(2)0.6931\ln(36) \approx 3.5835 \quad \text{and} \quad \ln(2) \approx 0.6931 So, ln(36)ln(2)=3.58350.69315.17\frac{\ln(36)}{\ln(2)} = \frac{3.5835}{0.6931} \approx 5.17 Thus, we have: 3x1=5.173x - 1 = 5.17

Step 3: Solve for xx

Now, solve for xx: 3x=5.17+1=6.173x = 5.17 + 1 = 6.17 x=6.1732.06x = \frac{6.17}{3} \approx 2.06

Final Answer:

x2.06x \approx 2.06

Would you like further details or have any questions?

Here are 5 related questions:

  1. How do you solve logarithmic equations in general?
  2. What are the properties of logarithms?
  3. How can logarithms help in solving exponential equations?
  4. What if the base of the exponent were a different number?
  5. How can you approximate logarithms without a calculator?

Tip: Remember that taking the logarithm of both sides is a useful tool for solving exponential equations where the variable is in the exponent.

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Math Problem Analysis

Mathematical Concepts

Exponential Equations
Logarithms

Formulas

ln(a^b) = b * ln(a)
Logarithmic properties to solve for exponents

Theorems

Logarithm Power Rule
Exponentiation and Logarithmic Inverses

Suitable Grade Level

Grades 10-12