Question

已知:(27/8)的(x-1)次方乘以(2/3)的(2x-3)次方=4/9,求x

Answer 1

(27/8)的(x-1)次方乘以(2/3)的(2x-3)次方=4/9

(2/3)^(3-3x)*(2/3)^(2x-3)=4/9

(2/3)^(-x)=(2/3)^2

-x=2

x=-2