Question

Which function is increasing?

A. F(x)= (1/15)^x

B. f(x) = (0.5) ^x

C. F(x)= (1/5)^x

D. f(x)=5^x

Answers

Answered by GPT-4o mini
To determine which function is increasing, we can analyze the base of the exponent in each function.

- A. \( F(x) = \left(\frac{1}{15}\right)^x \): This function has a base less than 1. As \( x \) increases, \( F(x) \) decreases.

- B. \( f(x) = (0.5)^x \): Similar to A, this function has a base less than 1. As \( x \) increases, \( f(x) \) decreases.

- C. \( F(x) = \left(\frac{1}{5}\right)^x \): Again, this has a base less than 1. So, as \( x \) increases, \( F(x) \) decreases.

- D. \( f(x) = 5^x \): This function has a base greater than 1. As \( x \) increases, \( f(x) \) increases.

Thus, the increasing function is:

**D. \( f(x) = 5^x \)**.

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