Math Problem Statement

select the correct answer. Solve the equation for x.

2^{(x \ + \ 1)} \ = \ 3^{(-x \ + \ 1)}

x ≈ 1.23

x ≈ 2.34

x ≈ 0.73

x ≈ 0.23

Solution

To solve the equation:

2(x+1)=3(x+1)2^{(x + 1)} = 3^{(-x + 1)}

we take the natural logarithm of both sides:

ln(2(x+1))=ln(3(x+1))\ln\left(2^{(x+1)}\right) = \ln\left(3^{(-x+1)}\right)

By applying the logarithmic rule ln(ab)=bln(a)\ln(a^b) = b \ln(a), this simplifies to:

(x+1)ln(2)=(x+1)ln(3)(x+1)\ln(2) = (-x+1)\ln(3)

Now, expand both sides:

xln(2)+ln(2)=xln(3)+ln(3)x\ln(2) + \ln(2) = -x\ln(3) + \ln(3)

Next, collect the terms involving xx on one side:

xln(2)+xln(3)=ln(3)ln(2)x\ln(2) + x\ln(3) = \ln(3) - \ln(2)

Factor out xx:

x(ln(2)+ln(3))=ln(3)ln(2)x(\ln(2) + \ln(3)) = \ln(3) - \ln(2)

Solve for xx:

x=ln(3)ln(2)ln(2)+ln(3)x = \frac{\ln(3) - \ln(2)}{\ln(2) + \ln(3)}

Now, we can calculate the value of xx. Let me do that.The value of xx is approximately 0.230.23.

Therefore, the correct answer is:

x0.23x \approx 0.23

Do you want any further details or explanations?

Here are 5 related questions to expand on this topic:

  1. How do you solve logarithmic equations with different bases?
  2. What is the change of base formula for logarithms?
  3. Can you explain how to handle exponential equations where the exponents contain variables?
  4. What are some common logarithmic properties used in equation solving?
  5. How does the natural logarithm (ln\ln) differ from other logarithms?

Tip: Remember that logarithmic functions are the inverse of exponential functions!

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Math Problem Analysis

Mathematical Concepts

Exponential Equations
Logarithms
Algebra

Formulas

Natural Logarithm: ln(a^b) = b * ln(a)
Exponential Equation Solving: x = (ln(b) - ln(a)) / (ln(a) + ln(b))

Theorems

Logarithmic Properties
Inverse Functions of Exponentials

Suitable Grade Level

Grades 10-12