How do you evaluate $f(-1)$ given the function $f(t)=\frac{1}{2} t^2+4$ ?

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Answer 1 · 2018-05-13T20:42:20

$f(-1)=9/2$

$"to evaluate "f(-1)" substitute "t=-1" into "f(t)$

$rArrf(color(red)(-1))=1/2(color(red)(-1))^2+4=1/2+4=4 1/2=9/2$

How do you evaluate f(-1)f(-1) given the function f(t)=\frac{1}{2} t^2+4f(t)=\frac{1}{2} t^2+4?