高二必修五
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/08 16:24:26
![](http://img.wesiedu.com/upload/f/fc/ffc1ede75e77c89c29cf3d42377cf1c7.jpg)
![高二必修五](/uploads/image/z/18325649-65-9.jpg?t=%E9%AB%98%E4%BA%8C%E5%BF%85%E4%BF%AE%E4%BA%94)
解题思路: a9/(b5+b7)+a3/(b8+b4) =a9/2b6+a3/2b6 =a9+a3/2b6 =2a6/2b6 =(a1+a11)/(b1+b11) =11(a1+a11)/11(b1+b11) =[11(a1+a11)/2]/[11(b1+b11)/2] =S11/T11 =19/41
解题过程:
a9/(b5+b7)+a3/(b8+b4)
=a9/2b6+a3/2b6
=a9+a3/2b6
=2a6/2b6
=(a1+a11)/(b1+b11)
=11(a1+a11)/11(b1+b11)
=[11(a1+a11)/2]/[11(b1+b11)/2]
=S11/T11
=19/41
解题过程:
a9/(b5+b7)+a3/(b8+b4)
=a9/2b6+a3/2b6
=a9+a3/2b6
=2a6/2b6
=(a1+a11)/(b1+b11)
=11(a1+a11)/11(b1+b11)
=[11(a1+a11)/2]/[11(b1+b11)/2]
=S11/T11
=19/41