解方程(1/3)^(1-xx)×9^x=9
2个回答
3^(2x-1+x^2)=3^2
x^2+2x-1=2
x^2+2x-3=0
(x-1)(x+3)=0
x=1或x=-3
相关问题
解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20
3×1.7+4x=9.9解方程
解方程(1)2x+3×0.9=24.9
(1/4x+9)=(x-9)×2/3这方程怎么解?
解下列方程或比例:4x-7×1.3=9.9
解方程:3/5x=1/2×8/9
解方程x-[1/3][x-[1/3](x-9)]=[1/9](x-9)
解方程x-[1/3][x-[1/3](x-9)]=[1/9](x-9)
解方程x-[1/3][x-[1/3](x-9)]=[1/9](x-9)
x=8是方程9×3-1.7=( )的解