21-04-2022
Mathematics

contestada

Find f(-2) for f(x) = 5•3^x
А. 1/45
B. -45
C.-30
D. 5/9

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loneguy loneguy

21-04-2022

[tex]f(x) = 5 \cdot 3^x\\\\\\f(-2) = 5\cdot 3^{-2}\\\\~~~~~~~~~=5\cdot \dfrac 1{3^2}\\\\~~~~~~~~~=\dfrac 59\\\\\text{Hence the answer is D.}[/tex]

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