作业帮已知2^x = 8^y+1,9^y = 3^x-9 ,1/3x+1/2y =
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 17:38:04
x){}K*l,*
u,*l
]K C}
mC}#MR>) lH6YCi_.|g{u>{+4LV(NRxڻT0| f Z VgTi O[
J@fUi] XDP}+lL! LlSf6yv E
已知2^x = 8^y+1,9^y = 3^x-9 ,1/3x+1/2y =
已知2^x = 8^y+1,9^y = 3^x-9 ,1/3x+1/2y =
已知2^x = 8^y+1,9^y = 3^x-9 ,1/3x+1/2y =
怀疑题目漏掉了括号：
2^x = 8^(y+1)= 2^(3y+1) 即x=3y+1 1式
9^y = 3^2y = 3^(x-9) 即2y=x-9 2式
1式代入2式
2y=3y+1-9 =3y-8
y=8,代入式1得x=25
1/3x+1/2y = 1/24+1/50 = 37/600