f(x)
=a(tanx-sinx)/x^3 ; x<0
=-1 ; x=0
=ln( 1+(a+b)x ) ; x>0
f(0-)= lim(x->0) a(tanx-sinx)/判槐x^3 = a/2
f(0) = -1
=> a =-2
f(0+)
=lim(x->0) ln( 1+(a+b)x )
=lim(x->0) ln( 1+(-2+b)x )
=0
b可拍冲手袭嫌以是任何实数
ie
(a,b)= (-2, b)
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024