1又1/2*5+3又1/5*8+5又1/8*11+7又1/11*14+9又1/14*17+11又1/17*20
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 14:00:21
![1又1/2*5+3又1/5*8+5又1/8*11+7又1/11*14+9又1/14*17+11又1/17*20](/uploads/image/z/202180-4-0.jpg?t=1%E5%8F%881%2F2%2A5%2B3%E5%8F%881%2F5%2A8%2B5%E5%8F%881%2F8%2A11%2B7%E5%8F%881%2F11%2A14%2B9%E5%8F%881%2F14%2A17%2B11%E5%8F%881%2F17%2A20)
1又1/2*5+3又1/5*8+5又1/8*11+7又1/11*14+9又1/14*17+11又1/17*20
1又1/2*5+3又1/5*8+5又1/8*11+7又1/11*14+9又1/14*17+11又1/17*20
1又1/2*5+3又1/5*8+5又1/8*11+7又1/11*14+9又1/14*17+11又1/17*20
=15/2+128/5+451/8+1092/11+2159/14+3760/17
=17