№1
б)
х+1\х-3>2
x+1>2 x-3>2
x>1 x>5
x∈]5 +∞[
в)
3\1+х + 5\1-х<1<br>3(1-x)+5(1+x)<1<br>3-3x+5+5x<1<br>2+2x<1<br>2(1+x)<1<br>1+x<1<br>x<0<br>x∈]-∞ 0[
#2
a)
(x-1)(x+3)\ (x-5)>0
x-1>0 x+3>0 x-5>0
x>1 x>-3 x>5
x∈]5 +∞[
б)
(х+3)(х+2)\ (х+1)²≤0
x+3≤0 x+2≤0 x+1<0<br>x≤-3 x≤-2 x<-1<br>x∈-∞ -1[