var('x')
f=2*x^3 +3*x^2 -36*x +7
plot(f, (x,-6, 6))
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df=diff(f,x)
df
6*x^2 + 6*x - 36 6*x^2 + 6*x - 36 |
solve(df==0,x)
[x == -3, x == 2] [x == -3, x == 2] |
dff=diff(df,x)
dff
12*x + 6 12*x + 6 |
solve(dff==0,x)
[x == (-1/2)] [x == (-1/2)] |
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