Question

An irrational number between $\frac{1}{7}$ $\frac{2}{7}$ is

(a)$\frac{1}{2}(\frac{1}{7}+\frac{2}{7})$

(b)$(\frac{1}{7}\times \frac{2}{7})$

(c)$\sqrt{\frac{1}{7}\times \frac{2}{7}}$

(d)none of these

Answer 1

(c) $\sqrt{\frac{1}{7}\times \frac{2}{7}}$

(a) and (b) are rational numbers

An irrational number between a and b is given as $\sqrt{ab}$