Question

a 3^2+3^-2
b 5.38} +12.\sqrt[4]{81}[/tex]

Answer 1

Resposta:

$a)\frac{82}{9}$

$b)226$

Explicação passo a passo:

$a) 3^{2} +3^{-2}$

-------------------------------------

⇒ $3^{2} =3.3=9$

⇒ $3^{-2} =\frac{1}{3^{2} } =\frac{1}{9}$

-------------------------------------

$9+\frac{1}{9}$

$9.\frac{9}{9} +\frac{1}{9}$

$\frac{9.9}{9} +\frac{1}{9}$

$\frac{81}{9} +\frac{1}{9}$

$\frac{81+1}{9}$

$\frac{82}{9}$

$b)5.38+12.\sqrt[4]{81}$

$190+12.\sqrt[4]{3^{4} }$

$190+12.3$

$190+36$

$226$