你好！数学之美为你解答(x^n)² = 8x^(2n) = 8( 1/2 x^3n )² - 3(x²)^2n= 1/4 x^6n - 3x^4n= x^4n ( 1/4 x^2n - 3)= 8² × ( 1/4 ×8 - 3)= - 64
2n次方的值等于-64
