Exer. 6566: (a) Show that f takes on both positive and negative values on the interval [1, 2]. (b) Use the method of Exercise 63, with , to approximate a zero of f to two-decimal-place accuracy

Lecture 2 Left off last time : limf(x) = L If for every ε> 0 we can find δ > 0 x→c 0 0 f(x) − |3| < ε where 0< |xc|