Сократи дробь.
\(\dfrac{b+\sqrt{7}}{7-b^2}\)
Выбери верный вариант.
\(\dfrac{1+\sqrt{7}}{7-b}\)
\(\dfrac{1}{b-\sqrt{7}}\)
\(\dfrac{1}{\sqrt{7}-b}\)
\(\dfrac{b+1}{\sqrt{7}-b^2}\)