Пошаговое объяснение:
log12(27)+log12(64)=log12(27*64)=3log9(36/4)-5= 1-5=-43-0,27=2,735 ^ (log5(5)+log5(4))=5^log5(20)=20log50(5^3)+log50(0,4)=log50=log50(50)=1log3(21a)=11, log3(3*7a)=11, Log3(3)+log3(7a)=11, 1+log3(7a)=11, log3(7a)=103log4(a)=18, log4(a)=6. Log4(a*4^4)=log4(a)+4log4(4)= 6+4*1=103^-log3^(-1)(4)=3^log3(4)=4. 9-4=55+log50(5^-1)-log50(10)=5+log50(2/100)=5+log50(50^-1)=5-1=42lod7(7)-(-log7(7))+5=2+1+5=8
