Solve the exponential equation $3 \times 2^{x+1} = 24$ without using logarithms.

AlgebraExponential EquationsExponents
2025/4/23

1. Problem Description

Solve the exponential equation 3×2x+1=243 \times 2^{x+1} = 24 without using logarithms.

2. Solution Steps

We are given the equation 3×2x+1=243 \times 2^{x+1} = 24.
First, we divide both sides of the equation by 3:
2x+1=2432^{x+1} = \frac{24}{3}
2x+1=82^{x+1} = 8
Now, we can write 8 as a power of 2:
8=238 = 2^3
So we have:
2x+1=232^{x+1} = 2^3
Since the bases are equal, we can equate the exponents:
x+1=3x+1 = 3
Subtract 1 from both sides:
x=31x = 3 - 1
x=2x = 2

3. Final Answer

The solution to the equation is x=2x = 2.

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