У=3(х-2)^3+2
у=3(х-2)^5
у=3х^5-30
у=х^5-10
4t+3<0
4t<-3
t<-3/4
ответ: при t∈ (-<span>∞</span> ;-3/4)
А15 - а10/(15-10) = -80-10/5 = -90/5 = -18
9*sin120°*tg30° = 9*sin(90°+30°)*tg30° = <span>9*cos30</span>°<span>*(sin30</span>°<span>/cos30</span>°<span>) = 9*sin30</span>° = 9*0.5 <span>= 4.5</span>