Question

高二数学求导数

y=(4x^2-7)(2-x)

Answer 1

c'=0(c为常数）
(x^a)'=ax^(a-1),a为常数且a≠0
(a^x)'=a^xlna
(e^x)'=e^x
(logax)'=1/(xlna),a>0且 a≠1
(lnx)'=1/x
(sinx)'=cosx
(cosx)'=-sinx
(tanx)'=(secx)^2
(secx)'=secxtanx
(cotx)'=-(cscx)^2
(cscx)'=-csxcotx
(arcsinx)'=1/√(1-x^2)
(arccosx)'=-1/√(1-x^2)
(arctanx)'=1/(1+x^2)
(arccotx)'=-1/(1+x^2)
(shx)'=chx
(chx)'=shx
（uv)'=uv'+u'v
(u+v)'=u'+v'
(u/)'=(u'v-uv')/^2

Answer 2

y=8x^2-4x^3+7x-14
∴y'=(8x^2)'-(4x^3)'+(7x)'-14'
=-12x^2+16x+7