Answer
See below.
Work Step by Step
According to the exercise:
$x_1=f(x_0)=f(1)=8-5(1)=3$
$x_2=f(x_1)=f(3)=8-5(3)=-7$
$x_3=f(x_2)=f(-7)=8-5(-7)=43$
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