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hartnnBest ResponseYou've already chosen the best response.1
because \(\huge \frac{\sqrt 5}{5}=\frac{\sqrt 5}{\sqrt5.\sqrt 5}=\frac{1}{\sqrt 5}\)
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
i still dont get it..><
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
\(\huge \frac{2\sqrt 5}{5}=\frac{2\sqrt 5}{\sqrt5.\sqrt 5}=\frac{2}{\sqrt 5}\) which step ?
 one year ago

Asad0000Best ResponseYou've already chosen the best response.0
(2√5)/5 can also be written as \[\frac{ 2 }{ \sqrt{5} }\]
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
reciprocal means inversing the ratio, a/b becomes b/a
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
why is the denominator √5 multiply by √5
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
any number can be expressed as \(a=\sqrt a.\sqrt a\)
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
\(x^m.x^n=x^{m+n} \\so, \huge \sqrt 5.\sqrt 5= 5^{1/2}.5^{1/2}=5^{1/2+1/2}=5^1\)
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
wait basically....√5 and 5 is the same?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
no.... 5 and \(\sqrt 5.\sqrt 5\) are same.
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
but why do we have to multply by √5??
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
OMG i think i got it!!
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
so first, the reciprocal of (2√5)/5 is 5/2√5
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
es, you can do that way also!
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
and √5 crosses out which equals. √5 / 2!!
 one year ago

lsuganoBest ResponseYou've already chosen the best response.0
thank you soooo much!!!! im sorry if i put some streess on you!! i am really bad at math ><
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
no problem at all :) welcome ^_^
 one year ago
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