Ivars Wrote:For basic readers like me, what exactly is \( {f_2} \) in \( z = 1 - f_2 t x \)? and is \( z = 1 - f_2 t x = 1- f_2 *t* x \)?
Well, \( f_2 = \frac{f''(0)}{2} \) and in general, \( f_k = \frac{1}{k!}\frac{d^k}{dx^k}f(0) = \frac{1}{k!} \left[ \frac{d^k}{dx^k}f(x)\right]_{x=0} \). These are the coefficients of a Taylor series.
And yes, that's normal multiplication.
Any other questions?

Andrew Robbins

