Répondre :
A=(8^(n+1)+8^n)²/(4^n-4^(n-1))³
=((8^n)*(8+1))²/((4^(n-1))*(4-1))³
=(81*8^(2n))/(27*4^(3n-3))
=81/27*(2³)^(2n)*(2²)^(3-3n)
=3*2^(6n)*4^3^2^(-6n)
=3*64
=192
=((8^n)*(8+1))²/((4^(n-1))*(4-1))³
=(81*8^(2n))/(27*4^(3n-3))
=81/27*(2³)^(2n)*(2²)^(3-3n)
=3*2^(6n)*4^3^2^(-6n)
=3*64
=192