设n是正整数,且x^4n=3,求2(x^3n)^4-4(x^2)^2n的值

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设n是正整数,且x^4n=3,求2(x^3n)^4-4(x^2)^2n的值

设n是正整数,且x^4n=3,求2(x^3n)^4-4(x^2)^2n的值
设n是正整数,且x^4n=3,求2(x^3n)^4-4(x^2)^2n的值

设n是正整数,且x^4n=3,求2(x^3n)^4-4(x^2)^2n的值
2(x^3n)^4-4(x^2)^2n
=2x^12n-4x^4n
=2(x^4n)^3-4x^4n
=2*3^3-4*3
=42