0 \wedge 2x+1>0\\ x>-1 \wedge 2x>-1\\ x>-1\wedge x>-\frac{1}{2}\\ x\in(-\frac{1}{2},\infty)\\\\ \log_6(x+1)(2x+1)<\log_66^1\\ \log_6(2x^2+x+2x+1)<\log_66^1\\ \log_6(2x^2+3x+1)<\log_66^1\\ 2x^2+3x+1<6\\ 2x^2+3x-5<0\\ 2x^2-2x+5x-5<0\\ 2x(x-1)+5(x-1)<0\\ (2x+5)(x-1)<0\\ x\in(-\frac{5}{2},1)\\\\ x\in(-\frac{5}{2},1)\cap(-\frac{1}{2},\infty)\\ \underline{x\in(-\frac{1}{2},1)} " alt="\\\log_6(x+1)+\log_6(2x+1)<1\\ x+1>0 \wedge 2x+1>0\\ x>-1 \wedge 2x>-1\\ x>-1\wedge x>-\frac{1}{2}\\ x\in(-\frac{1}{2},\infty)\\\\ \log_6(x+1)(2x+1)<\log_66^1\\ \log_6(2x^2+x+2x+1)<\log_66^1\\ \log_6(2x^2+3x+1)<\log_66^1\\ 2x^2+3x+1<6\\ 2x^2+3x-5<0\\ 2x^2-2x+5x-5<0\\ 2x(x-1)+5(x-1)<0\\ (2x+5)(x-1)<0\\ x\in(-\frac{5}{2},1)\\\\ x\in(-\frac{5}{2},1)\cap(-\frac{1}{2},\infty)\\ \underline{x\in(-\frac{1}{2},1)} " align="absmiddle" class="latex-formula">