解1：第n个等式是：n×(n/(n+1)=n-n/(n+1)解2：[(1-1/2)/10]×[(2-2/3)/9]×[(3-3/4)/8]×……×[(10-10/11)/1]=[(1×1/2)/10]×[(2×2/3)/9]×[(3×3/4)/8]×……×[(10×10/11)/1]=[(1×1/2)/1][(2×2/3)/2][(3×3...