Set 8: Exponential Functions

Choice A is correct. Choice A is the correct answer. Use negative exponent rule. 1. Rule: $\frac{1}{a^m} = a^{-m}$. 2. Apply: $\frac{1}{e^{3 x}} = e^{-3 x}$. Strategic Tip: Negative exponents indicate reciprocals. Choice B is incorrect because negative sign goes in exponent, not coefficient. Choice C is incorrect because this changes the expression entirely. Choice D is incorrect because this is not equivalent.