1)5^(-6log(5) 2=5^log(5) 2^(-6)=1/2^6=1/64;
b)log(8/27) (81/16)=log((2/3)^3) (3/2)^4=log((3/2)^-3) (3/2)^4=(log(3/2) (3/2)^4) /
/log(3/2) (3/2)^-3)=4/(-3)=-1(1/3);
c)lg4/(lg64-lg8)=lg4 / (lg(64/8)=lg4 / lg8=lg(2^2) /lg(2^3)=2lg2/(3lg2)=2/3
2)lgx=lg(1/a)^(-p)
lgx=-p lga^(-1)=-p *(-1)lga=plga
3)lgx=lg7-lg3+lg2
lgx=lg(7/3 *2)
x=14/3; x=4(2/3)