Solve these questions by using Algebraic Perturbation series method using this series U = U_o + e U_1+...
1. eU^3+U-2=0
2. eU^3+(U-2)=0
3. eU^4+U^3-2U^2_U+2=0
4. U^2-U-2+e/2(U^2+2U+3)=0
5. eU^4-U^2+3U-2=0
6. eU^4-U^3+3U-2=0
7. eU^4+U^2+2U-1=0
8. e(U^4+U^3)-U^2+3U-2=0