lim x趋近于0 (sinx+tan3x)/2x的极限值

问题描述:

lim x趋近于0 (sinx+tan3x)/2x的极限值

sinx is the same infinitesimal as x.
tan3x is the same infinitesimal as 3x.
Therefore,lim (sinx+tan3x)/2x = 4x/2x = 2