Задача 22864 ...

u1855730134

25.01.2018

log^2 √7 (49)

SOVA

29.01.2018

★

49=7^2=((sqrt(7))^2)^2=(sqrt(7))^4

log_(sqrt(7))sqrt(7)^4=4log_(sqrt(7))sqrt(7)=4*1=4

(log_(sqrt(7))49)^2=(log_(sqrt(7))(sqrt(7)^4))^2=4^2=16