1⼀2*4+1⼀4*6+1⼀6*8+....1⼀98*100 这是初中的数学题,求大姐姐大哥哥些解答,急急啊

2024-12-25 06:13:37
推荐回答(2个)
回答1:

1/2×4+1/4×6+1/6×8+........+1/98×100
=1/2(1/2-1/4)+1/2(1/4-1/6)+...+1/2(1/96-1/98)+1/2(1/98-1/100)
=1/2(1/2-1/100)
=49/200

回答2:

53.479