# Chapter 5 - Logarithmic Functions - Exercises to Skills for Chapter 5 - Page 232: 15

$4=e^{x^2}$

#### Work Step by Step

Since $e^{\ln a}=a$ for all positive $a$, the equation can be simplified to $$e^{\ln 4}=e^{x^2}$$ $$4 = e^{x^2}$$

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