Question

Cât este 2 la puterea -2 și 3 la puterea -3?

Answer 1

2^-2=1/2^2=1/4
3^-3=1/3^3=1/27

Answer 2

$2^{-2}=(\frac{1}{2})^{2}=\frac{1^{2}}{2^{2}}=\frac{1}{4}=0,25$

$3^{-3}=(\frac{1}{3})^{3}=\frac{1^{3}}{3^{3}}=\frac{1}{27}$


$OBS!!!$

$\boxed{ n^{-m}=(\frac{1}{n})^{m}}$

$\boxed{ (\frac{a}{b} )^{-c}=( \frac{b}{a} )^{c}=\frac{b^{c}}{a^{c}}}$