(1)原式=(-1/2)×(-2/3)×(-3/4)×...×(-99/100)=-1/100(2)2014×(1-1/2)×(1-1/3)×(1-1/4)×……×(1-1/2014)=2014×(1/2×2/3×3/4×……×2013/2014)=2014×1/2014=1