已知A=1/2*3/4*5/6……*97/98*99/100,B=2/3×4/5×6/7×8/9×.×98/99和1/1
2个回答
B=2/3×4/5×6/7×8/9×.×98/99
A=1/2×3/4×5/6×7/8×.×97/98×99/100
1/2
相关问题
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