Find f(-2) for f(x) = 2 • 3 ^xА. -18B. 2/9C. 1/18 D. -36
Accepted Solution
A:
Answer:2/9Step-by-step explanation:We have [tex]f(x)=2 \cdot 3^x[/tex] and are asked to find [tex]f(-2)[/tex].[tex]f(-2)[/tex] means to replace x with -2 and evaluate the expression named f.Let's do that:[tex]f(x)=2 \cdot 3^x[/tex][tex]f(-2)=2 \cdot 3^{-2}[/tex][tex]f(-2)=2 \cdot \frac{1}{3^2}[/tex][tex]f(-2)=2 \cdot \frac{1}{9}[/tex][tex]f(-2)=\frac{2}{9}[/tex]