解：f(x)=sin(x+30°-30°）=sinx令Fm(x)=If(xm+1)-f(xm)]I考虑-1≤f(x)≤1则Fm(x)≤212=∑Fm(x)≤2m可得m≥6考虑m和n的关系n=m+1可得n≥7
