Question

1.b(x÷y)=bx÷by正确吗?请说明理由.

Answer 1

1不正确,b(x÷y)=b(x/y)=bx/y

2,2a^6n-1

=2a^6n-2+1

=2[(a^2n)^3-1]+1

=2[(a^2n-1)(a^4n+a^2n+1)]+1

=2[(3-1)(9+3+1)]+1

=2*2*13+1

=53