1.b(x÷y)=bx÷by正确吗?请说明理由.2.a2n=3,则2a6n-1的值为?要求写出过程.(注意:2n和6n是上标的)

Question

1.b(x÷y)=bx÷by正确吗?请说明理由.
2.a2n=3,则2a6n-1的值为?要求写出过程.(注意:2n和6n是上标的)

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