A(n) , denoted 3a, b4, consists of all real numbers x for which a x b.

L27 - 2 We introduce a new method that applies to many limits of this form: L’Hˆ opital’s Rule ▯ Suppose that f and g are diﬀerentiable and g (x) ▯=0er a (except possibly at a). Suppose that lim f(x)=0a ndl g(x)=0 x→a x→a or x→a f(x)= ±∞ and lim x→a)= ±∞. Then if it exists or is ±∞ . Note the following: 1. L’Hˆpital’s rule applies to one-sided limits and limits at inﬁnity. 2. L’Hoˆpital’s rule is the limit of quotient of derivatives, not the limit of derivative of the quotient.