16的-3/4次方是多少16^(-3/4)=[16^(1/4)]^(-3)=2^(-3)=1/[2^3]=1/8 -(64的-2/3次方)=-[64^(1/3)]^(-2)=-[4]^(-2)=-[1/(4^2)]-1/16
1.16的-3/4次方=(2^4)^(-3/4)=2^(-3)=1/82.-(64的-2/3次方) =-{2^[6*(-2/3)]}=-{2^[-4]}=-1/16
1.1/82.-1/16