1.Ñ’ = 0
2.x’=1
3.(u+v)’=u’+v’
4.(uv)’=u’v+uv’
5.(cu)’= cu’
6.(u/v)’= u’v-uv’/v2
7.(un)’= nun-1*u’
8þ(√ã)ý=(1.2√ã)*ãý
9þ(1.ã) =-1.ã2*ãý
10þ(óã)ý= óã*ãý
11.(au)’= au lna*u’
12.(lnu)’=1/u*u’
13.(logau)’ = (1/ulna)*u’
Âûâîäèì ôîðìóëó y=lnx
1.Äàäèì àðãóìåíòó õ ïðèðàùåíèå∆x≠0è íàéäåì íàðàùåííîå çíà÷åíèå ôóíêöèè y+∆y=f(x+∆x)
x. ∆x≠0 y+∆y=ln(x+∆x)
2.Íàõîäèì ïðèðàùåíèå ôóíêöèè∆y=f(x+∆x)-f(x)
∆y=ln(x+∆x)-lnx=ln(x+∆x/x)= ln (1+∆x/x)
3.Cîñòàâëÿåì îòíîøåíèå ∆y/∆x
∆y/∆x= 1/∆x*ln (1+∆x/x)
4.Íàõîäèì ïðåäåë ýòîãî îòíîøåíèÿ ïðè ∆x→0
ò.å. y’=lim∆y/∆x (åñëè ýòîò ïðåäåë ñóùåñòâóåò).
y’= lim∆y/∆x= lim 1/∆xln(1+∆x/x)= (0/0)= lim ln(1+y)/xy=1/xlimln(1+y)1/y= 1/xlimlne=1/x