Question

Determine o valor da expressao 3-¹+2-²-(4)-¹

Answer 1

veja

$3^{-1} + 2^{-2} -(4)^-^1= \\ \frac{1}{3} + \frac{1}{2^2} - \frac{1}{4} =$

$\frac{1}{3}+ \frac{1}{4}- \frac{1}{4} =\fbox{ \frac{1}{3} }$

Answer 2

3-1+2-2(4)-1=1/3+1/4-1/4=1/3