简便计算:(1+1/2)*(1+1/3)*(1+1/4)*……*(1+1/19)*(1+1/20)
梅洪回答:
(1+1/2)*(1+1/3)*(1+1/4)*……*(1+1/19)*(1+1/20)
=3/2*4/3*……*21/20
=21/2
=10.5
沈绿涟回答:
不明白:3/2*4/3*……*21/203哪来的,4哪来的,21哪来的?
梅洪回答:
1+1/2=2/2+1/2=3/21+1/3=3/3+1/3=4/3……1+1/20=20/20+1/20=21/20
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