Re: roots to 4th, 5th, 6th & 7th degree polynomials
Jon G. wrote:
> ...
> A better strategy is to use the areas above and below the tangent line when
> f(x) crosses the x-axis.
>
As mentionned: if all works as you planed, you only find roots where the
sign changes.
But ok, you could look at f'(x) to find the roots where f(x) has a root
of even multipicity.
> g(x) = f '(x) x + b equation of tangent line
>
Mh, the equation of tangent line at x0 is
g(x) = f '(x0)(x-x0) + f(x0)
isn't it?
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Dr. Detlef M$(D??(Bller,
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