1.用洛毕达法则
=lim t->0 1/(1+t)
=1
2.用洛毕达法则
=lim x->0 e^x
=1
3.上下同时乘以(√(6-x)+2)(√(3-x)+1 )
得lim x->2(2-x)(√(3-x)+1 )/(2-x)(√(6-x)+2)
=lim x->2 (√(3-x)+1 )/(√(6-x)+2)
=1/2
4.用洛毕达法则
=lim x->0 a^xlna
=lna
1.用洛毕达法则
=lim t->0 1/(1+t)
=1
2.用洛毕达法则
=lim x->0 e^x
=1
3.上下同时乘以(√(6-x)+2)(√(3-x)+1 )
得lim x->2(2-x)(√(3-x)+1 )/(2-x)(√(6-x)+2)
=lim x->2 (√(3-x)+1 )/(√(6-x)+2)
=1/2
4.用洛毕达法则
=lim x->0 a^xlna
=lna