Respuesta :

Given

[tex]f(x)=x^4+2x^2-1,[/tex]

in order to find f(3) we must replace every x in the function with a 3 and simplify:

[tex]f(3)=(3)^4+2(3)^2-1=81+2(9)-1=80+18=98.[/tex]

So f(3)=98.

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