第一题
2+2*0.8*0.2= 2.32
第二题
0-1 1/0.8=5/4
1-2 x=1+0.25(5/4+x) x=7/4
2-3 x=1+0.3(7/4+x) x=61/28
3-4 x=1+0.35(61/28+x) x=141/52
4-5 x=1+0.4(141/52+x) x=271/78
0-5 5/4+7/4+61/28+141/52+271/78=11.36
2+2*0.8*0.2= 2.32
第二题
0-1 1/0.8=5/4
1-2 x=1+0.25(5/4+x) x=7/4
2-3 x=1+0.3(7/4+x) x=61/28
3-4 x=1+0.35(61/28+x) x=141/52
4-5 x=1+0.4(141/52+x) x=271/78
0-5 5/4+7/4+61/28+141/52+271/78=11.36
19楼2015-10-23 20:29收起回复
