简便计算 (1+2/3)×(1-2/3)×(1+2/5)×(1-2/5)×.×(1+2
简便计算 (1+2/3)×(1-2/3)×(1+2/5)×(1-2/5)×.×(1+2
简便计算 (1+2/3)×(1-2/3)×(1+2/5)×(1-2/5)×.×(1+2/99)×(1-2/99)
简便计算 (1+2/3)×(1-2/3)×(1+2/5)×(1-2/5)×.×(1+2/99)×(1-2/99)
数学人气:980 ℃时间:2020-02-03 15:14:56
优质解答
(1+2/3)x(1-2/3)x(1+2/5)x(1-2/5)x...x(1+2/99)x(1-2/99)=(1-2/3)x(1+2/3)x(1-2/5)x(1+2/5)x(1-2/7)x(1+2/7)...x(1-2/97)x(1+2/97)x(1-2/99)x(1+2/99)=1/3 x 5/3 x 3/5 x 7/5 x 5/7 x 9/7 ...x 95/97 x 99/97 x 97/9...
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