计算a^n=2 b^n=3 a^2n+b^3n=( )

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计算a^n=2 b^n=3 a^2n+b^3n=( )

计算a^n=2 b^n=3 a^2n+b^3n=( )
计算a^n=2 b^n=3 a^2n+b^3n=( )

计算a^n=2 b^n=3 a^2n+b^3n=( )
a^2n+b^3n
=(a^n)^2+(b^n)^3
=2^2+3^3
=4+27
=31

a^2n=(a^n)^2=2^2=4;
b^3n=(b^n)^3=3^3=27;
a^2n+b^3n=31.