a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值

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a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值a^2n=4,求(2a^3n)^2-6a^4n+1(

a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值
a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值

a^2n=4,求(2a^3n)^2-6a^4n+1(-5a^4n-1)的值
因为a^2n=4
所以a^4n=a^2n*a^2n=16
a^6n=a^2n*a^2n*a^2n=64
所以
原式=4*a^6n-6*a^4n-5a^4n-1
=4*64-6*16-5*16-1
=79

a^(2n)=4,
(2a^3n)^2-6a^(4n+1)*[-5a^(4n-1)]
=4a^(6n)+30a^(4n-1+4n-1)
=4[a^(2n)]^3+30a^(8n)
=4*4^3+30[a^(2n)]^4
=256+30*4^4
=7936.

没说清楚啊
有很多理解啊,会产生歧义
是a^(2n)还是(a^2)n=4?,2a^3n是2(a^3)n还是(2a)^(3n)还是2(a^3n)?