Question

Show that n21×n12 =1 ,where symbols have their meanings.

Answer 1

Answer:   n =6 $\sqrt{7}$

Explanation:

 n21 * n12 = 1

$n^{2}$252 =1

$n^{2}$ = 1/252

n = $\sqrt{1/252}$

n=  6 $\sqrt{7}$