Question

[3 to the power x] +[3 to the power y] =4 ; [3 to the power -x] +[3 to the power -y] = 4/3

Answer 1

Step-by-step explanation:

(x^3)+(y^3)=4(-x^3)+(-y^3)

x^3+y^3=-4x^3-4y^3

x^3+4x^3+y^3+4y^3=0

5x^3+5y^3=0

hope it helps you