zad.7
a)
f(x)=x^3-x^2+3*x-7
g(x)=f.diff()
show(g(x))
x0=5
x1=x0-f(x0)/g(x0)
show(x0)
show(x1)
show(n(x1))
x2=x1-f(x1)/g(x1)
show(x2)
show(n(x2))
x3=x2-f(x2)/g(x2)
show(x3)
show(n(x3))

b)
f(x)=x^3-e^-x-2
g(x)=f.diff()
show(g(x))
x0=1
x1=x0-f(x0)/g(x0)
show(x0)
show(x1)
show(n(x1))
x2=x1-f(x1)/g(x1)
show(x2)
show(n(x2))
x3=x2-f(x2)/g(x2)
show(x3)
show(n(x3))



zad.8
f(x)=cos(x)-2*x^2
g(x)=f.diff()
show(g(x))
x0=1/2
d=0.001
x1=x0-f(x0)/g(x0)
show(x0)
show(x1)
show(n(x1))
show(n(abs(f(x1)))<d)
show(n(abs(x1-x0))<d)
x2=x1-f(x1)/g(x1)
show(x2)
show(n(x2))
show(n(abs(f(x2)))<d)
show(n(abs(x2-x1))<d)
x3=x2-f(x2)/g(x2)
show(x3)
show(n(x3))
show(n(abs(f(x3)))<d)
show(n(abs(x3-x2))<d)