Question

Alguem pode me dar um help pfv?
1)Racionalize os denominadores

Answer 1

Explicação passo-a-passo:

$a)~~{1\over\sqrt{2} }={\sqrt{2} \over\sqrt{2} .\sqrt{2}}={\sqrt{2} \over2}\\ \\ b)~~{3\over\sqrt{3} }={3\sqrt{3} \over\sqrt{3} .\sqrt{3} }={3\sqrt{3} \over3}=\sqrt{3} \\ \\ c)~~{2\over3\sqrt{7} }={2\sqrt{7} \over3\sqrt{7} .\sqrt{7} }={2\sqrt{7} \over3.7}={2\sqrt{7} \over21}$

$d)~~{5\over2\sqrt{5} }={5\sqrt{5} \over2.\sqrt{5} .\sqrt{5} }={5\sqrt{5} \over2.5}={\sqrt{5} \over2}\\ \\ e)~~{12\over\sqrt{18} }={12\over3\sqrt{2} }={12\sqrt{2} \over3.\sqrt{2} .\sqrt{2} }={12\sqrt{2} \over3.2}={12\sqrt{2} \over6}=2\sqrt{2}$

pulei a e)

no lugar de e é f

$e)~~{6\over\sqrt{3}}={6\sqrt{3} \over\sqrt{3} .\sqrt{3} }={6\sqrt{3} \over3}=2\sqrt{3}$