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when f(x)=-3(2)^-× what is the value of f(-3)

Sagot :

Let the function be,

[tex]f(x)=3\times2^{-x}[/tex]

Put -3 for x in the function to find f(-3) implies,

[tex]\begin{gathered} f(-3)=3\times2^{-(-3)} \\ =3\times2^3 \\ =3\times8 \\ =24 \end{gathered}[/tex]

Thus, f(-3) is 24.

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