1)это знак { корен 3^-2x<{3<br>3^-2х<3^1/2<br>-2х<1/2<br>х<-1/4<br>
2)(1/9)^-3х+1>{3
3^1/2(-3х+1)>3^1/2
1/2(-3х+1)>1/2
-3х+1>1
-3х>0
х>0
3)5^(х+1)/3>1/3{5
5^(х+1)/3>5^-1/3
(х+1)/3>-1/3
х+1>-1
х>-2
4)(3/7)^х^2>(9/49)^х+1.5
(3/7)^х^2>(3/7)^2х+3
х^2>2х+3
х^2-2х-3>0
D=4+12=16 D=4
x1>(2+4):2=3
x2>(2-4):2=-1
5)(1/27)^(x^2)+1>(1/9)^-(x^2)+8x
(1/3)^(3x^2)+3>(1/3)^-(2x^2)+16x
3x^2+3>-2x^2+16x
5x^2-16x+3>0
D=256-60=196 D=14
x1>(16-14):10=0.2
x2>(16+14):10=3