0.2+0.4+0.6+0.8=20.10+0.12+0.14+。。。。。+0.98=(0.10+0.98)*((0.98-0.10)/0.02+1)/2=24.30.2+0.4+0.6+0.8+0.10+0.12+0.14+。。。。。+0.98=26.3
28.91
