f(x)=1/2 a^4 x^2- 1/3 a^3 x^3-1/4 a^2x^4
1.g(x)=f(x)÷(-2/3a^2x^2) = -3a²/4 + ax/2 +3x²/8
2.g(1) = -3a²/4 + a/2 +3/8 (把x=1代入-3a²/4 + ax/2 +3x²/8 )
g(-1)= -3a²/4 - a/2 +3/8 (把x= -1代入-3a²/4 + ax/2 +3x²/8 )
故:g(1)+g(-1) = 3/4 - 3a²/2
f(x)=1/2 a^4 x^2- 1/3 a^3 x^3-1/4 a^2x^4
1.g(x)=f(x)÷(-2/3a^2x^2) = -3a²/4 + ax/2 +3x²/8
2.g(1) = -3a²/4 + a/2 +3/8 (把x=1代入-3a²/4 + ax/2 +3x²/8 )
g(-1)= -3a²/4 - a/2 +3/8 (把x= -1代入-3a²/4 + ax/2 +3x²/8 )
故:g(1)+g(-1) = 3/4 - 3a²/2