(2)(1/24+1/29)×30应该是 (2)(1/27+1/29)×30的吧
四个式子都减么2
则(1)(1/17+1/19)×20-2=3/17+1/19
(2)(1/27+1/29)×30-2=3/27+1/29
(3)(1/31+1/37)×40-2=9/31+3/37
(4)(1/41+1/47)×50-2=9/41+3/47
由此可知(1)>(2)(3)>(4)
比较(1)(3)
因为3/17+1/19=9/51+3/57
(2)(1/24+1/29)×30应该是 (2)(1/27+1/29)×30的吧
四个式子都减么2
则(1)(1/17+1/19)×20-2=3/17+1/19
(2)(1/27+1/29)×30-2=3/27+1/29
(3)(1/31+1/37)×40-2=9/31+3/37
(4)(1/41+1/47)×50-2=9/41+3/47
由此可知(1)>(2)(3)>(4)
比较(1)(3)
因为3/17+1/19=9/51+3/57