MATH 1A Lecture Notes - Lecture 13: Fairy, Product Rule, Ath
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\js\ *fco vt c 0^ -^nckovn chefmc of +art^r t l\"v\ -to cjif. Coaside"d a (a r"fca")") a"^d coi*^h , ffor h^o . ________ as a+h 0 |pft qevs nearer cu/\dl ^veacer +o a c hooiv \s. , h at>ptoach<>3 o) slope of i oan+ approaches dope of -tanqertt. Hence ^ iv>e derwat\ve of fc> fs not diffenenttable at x = q cf fa) has no wieaniny , ) inuiltwely ibis means iviere. is no -tanyent ime at x a. 2- ivie denvabve coun also be expressed as f"ca) = lim x-a: f"(a) fs also called (. mslanfaneous ] ra+eof chaneje of fcx) with respect to x oct x*a.
