
434 quotient rule
which is the quotient-rule formula. It is much easier
just to use the product and chain rules for any prob-
lem at hand rather than memorize the quotient-rule
formula.
fx
gx fx gx g x
fx
gx
fx
()
() () () ()
'( )
()
(
=′+⋅−
()
⋅′
=−
−2
))()
()
⋅′
()
gx
gx 2