s10001085 s10001085

16-03-2020
Mathematics

contestada

Solve. Check for extraneous solutions.
1. In(4x + 1) = ln(2x + 5)

Respuesta :

johnnydavid167 johnnydavid167

16-03-2020

Answer:

The answer is x = 2. No extraneous solutions.

Step-by-step explanation:

Raise both sides to the eth power:

4x + 1 = 2x + 5

2x + 1 = 5

2x = 4

x = 2

We plug this in:

ln(4(2)+1) = ln(8 + 1) = ln(9)

ln(2(2) + 5) = ln(4 + 5) = ln(9)

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