若a^n=3,b^2n=4,求(a^2b^4)^2n的值

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若a^n=3,b^2n=4,求(a^2b^4)^2n的值

(a^2b^4)^2n
=a^4nb^8n
=(a^n)^4*(b^2n)^4
=3^4*4^4
=81*256
=20736