Question

if a =(4/5)^-1 ÷(8/7)^0, find a^2​

Answer 1

if a =(4/5)^-1 ÷(8/7)^0, find a^2

$\sqrt{ \sqrt{ \sqrt{ \sqrt{ \sqrt{4 \sqrt{ \sqrt{ \sqrt{ \sqrt{ \sqrt{ \sqrt{ \sqrt{ \sqrt{16} } } } } } } } } } } } } = ?$