(1) lim (xsin*3/x+<tanx>/<2x>) x---趋于0
(2) lim x/(3sin3x) x---趋于0
(3) lim (sin*<x-3>)/(x*x-x-6) x---趋于3
得数是不是=lim (sin<x-3>)/(<x+2>*<x-3>)
=lim sin/(x+2)
=1/5sin
(1) lim (xsin*3/x+<tanx>/<2x>) x---趋于0
(2) lim x/(3sin3x) x---趋于0
(3) lim (sin*<x-3>)/(x*x-x-6) x---趋于3
得数是不是=lim (sin<x-3>)/(<x+2>*<x-3>)
=lim sin/(x+2)
=1/5sin
当x→∞时,
1/x→0,1/(1+x)→0,
而-1≤sinx≤1,
所以lim((1/x)*sinx+1/(1+x))=0+0=0