Calculus? (1 Viewer)

[Zokunu]

I don't seem to understand this ==''

a) Lim 1-x / x^2 - 7x + 6
x->1

b) Lim
x->3 x^2 - 16x +64 / x^3 - 21x^2 + 144x - 320

 

[braintic]

I don't seem to understand this ==''

a) Lim 1-x / x^2 - 7x + 6
x->1

b) Lim
x->3 x^2 - 16x +64 / x^3 - 21x^2 + 144x - 320

(a) Factorise, cancel, then substitute x=1.
(b) Same method, but denominator requires Ext 1 polynomials to factorise, so doesn't belong here.