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20 10 the thinking and process of solving the 24th question of the senior high school entrance examination in Chengdu.
Solution: ∫x 1 = 1, X2=2…Xn=n, y = k/x …

∴Y 1=k,Y2=k/2…Yn=k/n…

∫A 1 = x 1 y2 = A,A2 = X2Y3 … An = XNYN+ 1 …

∴y2=k/2=a,y3=k/3=2a/3…yn=k/n=2a/n,yn+ 1=2a/(n+ 1)…

∴a 1×a2×…×an= 1×a×2×2a/3×3×…×2a/n×n×2a/(n+ 1)

=[(2a)^n]/(n+ 1)