Решите неравенства: 1)radic;x+2gt;=3 2)radic;7-3xgt;5 3)radic;2x+1gt;-3 4)radic;3+2xgt;=radic;x+1 5)radic;8-2xlt;=radic;6x+15 6)2^xlt;1/8 7)(0,2)^xlt

1) √x+2>=3 √x+2>=3 |^2 x+2>=9 x>=9-2 x>=7 2) √7-3x>5 √7-3x>5 |^2 7-3x>25 -3x>25-7 |*(-1/3) x<(-6) 3) √2x+1>-3 √2x+1>-3 |^2 2x+1>9 2x>9-1 2x>8 |*(1/2) x>4 4)√3+2x>=√x+1 √3+2x>=√x+1 |^2 3+2x>=x+1 2x-x>=1-3 x>=-2 5) √8-2x<=√6x+15 √8-2x<=√6x+15 |^2 8-2x<=6x+15 -2x-6x<=15-8 -8x<=7 x>=-7/8 6) 2^x<1/8 2^x<1/2^3 2^x<2^(-3) x<-3 7)(0,2)^x<=-0,2 нет решений 8)(1/3)^x>=9 3^-x>=3^2 -x>=2 x<=-2