1) log0,5(x-1)=2, log0,5(x-1)=2, x>1, x-1=0,5^2, x-1=1/4, x=5/4, x>1, x=5/4, 2) logx+1(16)=2, logx+1(16)=2, x (-1,0) ∪ (0, +∞), 16=(x+1)^2, (x+1)^2=16, x+1=+-4, x+1=4, x+1=-4, x=3, x=-5, x (1-,0) ∪ (0, + ∞), x=3, 3) log2(x)+log2(x+2)=3, x (0, + ∞), log2(x^2+2x)=3, x^2+2x=2^3, x^2+2x=8, x=2, x(0, + ∞), x=-4, x=2, 4)