設(shè)曲線與直線x=-1的交點(diǎn)為為p,曲線在點(diǎn)p處的切線方程是:()
A.2x-y+2=0 B.2x+y+1=0 C.2x+y-3=0 D.2x-y+3=0
已知函數(shù)在x0處可導(dǎo),且的值是:()
A.4 B.-4 C.-2 D.2
設(shè)函數(shù),若,f(x)在點(diǎn)x=1處連續(xù)而且可導(dǎo),則k的值是:()
A.2 B.-2 C.-1 D.1