2(x-1)(x-0.5) < 0" alt="\frac{df}{dx} < 0 <=> 2(x-1)(x-0.5) < 0" align="absmiddle" class="latex-formula">
x-1 < 0 \&\& x-0.5 > 0 || x-1 > 0 \&\& x-0.5 < 0" alt="\frac{df}{dx} < 0 <=> x-1 < 0 \&\& x-0.5 > 0 || x-1 > 0 \&\& x-0.5 < 0" align="absmiddle" class="latex-formula">
x < 1 \&\& x > 0.5 || x > 1 \&\& x < 0.5" alt="\frac{df}{dx} < 0 <=> x < 1 \&\& x > 0.5 || x > 1 \&\& x < 0.5" align="absmiddle" class="latex-formula">
x < 1 \&\& x > 0.5" alt="\frac{df}{dx} < 0 <=> x < 1 \&\& x > 0.5" align="absmiddle" class="latex-formula">
x \in (0.5, 1)" alt="\frac{df}{dx} < 0 <=> x \in (0.5, 1)" align="absmiddle" class="latex-formula">