need your help in Newton method

[ilovecolours]

hi everyone can u please help me to explain newtons method to minimize logarithmic ( y=a- b (ln x) and parabolic equation? and pleass post its program also..

thank you in advance...

[r035198x]

What have you done so far?
Please read the posting guidelines .

[JosAH]

hi everyone can u please help me to explain newtons method to minimize logarithmic ( y=a- b (ln x) and parabolic equation? and pleass post its program also..

thank you in advance...

It's just a bit of math: x(n+1) == x(n) - y(x)/y'(x). The first derivative of y(x) w.r.t.
x can easily be found; even if you can't find it you can approximate it by:
y'(x) ~ (y(x+h)-y(x-h))/2h + O(h^2)

kind regards,

Jos