設函數(shù),若,f(x)在點x=1處連續(xù)而且可導,則k的值是:()
A.2 B.-2 C.-1 D.1
A.連續(xù)且可導 B.連續(xù)但不可導 C.不連續(xù) D.以上均不對
設在X=0處可導,則a、b的值為:()
A.a=1,b=0 B.a=0,b為任意常數(shù) C.a=0,b=0 D.a=1,b為任意常數(shù)