(1-log(7)28)(1-log(4)28)=? 18log(5) из 9 корней из 5=? log(4 корней из 6)6=?
2)=18log(5)5^(1/9)=log(5)5^(1/9*18)=log(5)5^2=log(5)25=2
1)...=(1-log(7)7-log(7)4)(1-log(4)4-log(4)7)=(1-1-log(7)4)(1-1-log(47)= =-log(7)4*(-log(4)7)=1 2)...=18log(5)√5+18log(5)9=18*0,5+18log(5)9=9+18log(5)9 3)...=1/[log(6)4√6]=1/[log(6)4+log(6)√6]=1/[log(6)4+0,5]