Ответ:
Объяснение:
tgx< V3, -П/2+Пn<x<П/3+Пn, n E Z
4х(х+3)=4-3х 4х²+12х=4-3х. 4х²+12х-4+3х=0. 4х²+15х-4=0. Д: 225+64= 289 = 17² х1 = (-15+7):8= -1; х2= (-15-7):8 = -2.75
Log(8a) (2) = 1 / log(2) (8a) = 1 / (log(2) (8) + log(2) (a)) = 1 / (3 - 3.5) = -2
Или 2/3+4/7(12:35)3/8 =2/3+2/7*3/4*12/35=<span>2/3+18/245=</span>544/735
А=(68,56-25,3):2=43,26/2=21,63в=2*(2,405+3,41)=2*5,815=11,63<span>а-в=21,63-11,63=10</span>