Question 181394
for x =0 
:
{{{f(x)=-x^3+3x+1}}}
:
-(0)^3+3(0)+1 =1
:
for x=1----->-(1)^3+3(1)+1=3
for x=2----->-(2)^3+3(2)+1=-1
for x=-1---->-(-1)^3+3(-1)+1=-1
for x=-2---->-(-2)^3+3(-2)+1=3
:
this is a good staring point
:
{{{graph(300,300,-10,10,-10,10,-x^3+3x+1)}}}