已知n为自然数,化简a的2n+2次方乘b的2n次方乘b的4次方,并求当a=3,b=-1/3时代数式的值

a^(2n+2)*b^(2n)*b^4=a^(2n+2)*b^(2n+4)a=3,b=-1/3则=3^(2n+2)*(-1/3)^(2n+2+2)=3^(2n+2)*(-1/3)^(2n+2)*(-1/3)^2=[3*(-1/3)]^(2n+2)*(1/9)=[(-1)^2]^(n+1)*(1/9)=1^(n+1)*(1/9)=1/9