Question

$a)( \frac{7}{2}) {}^{ - 2} \\ b)( - \sqrt{2}) {}^{0}$

Answer 1

$a)~~( \frac{7}{2} )^{-2}=( \frac{2}{7} )^2= \frac{4}{49} \\ \\ b)~~(- \sqrt{2} )^0=+1$