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Evaluate f(-1) using substitution: f(x) = 2x2 – 3x2 - 181 - 8

Evaluate F1 Using Substitution Fx 2x2 3x2 181 8 class=

Sagot :

The function is given as:

[tex]f(x)=2x^3-3x^2-18x-8[/tex]

To find f(-1) substitute x=-1 in the equation to get:

[tex]\begin{gathered} f(-1)=2(-1)^3-3(-1)^2-18(-1)-8 \\ f(-1)=-2-3+18-8 \\ f(-1)=5 \end{gathered}[/tex]

Hence the value of f(-1) is 5.

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