Question

encontre o valor da expressão
${3}^{ - 1} + {2}^{ - 2} - {( - 4)}^{ - 1} =$
​

Answer 1

Resposta:

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

Answer 2

Oie, tudo bem?

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

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

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

$= \frac{4 + 3}{12} + 4 {}^{ - 1}$

$= \frac{7}{12} + \frac{1}{4}$

$= \frac{7 + 3}{12}$

$= \frac{10}{12}$

$= \frac{10 {}^{ \div 2} }{12 {}^{ \div 2} }$

$\boxed { = \frac{5}{6} }$

Att. NBA YoungBoy