se a=√√5-1.√1+√5, então o valor de √a é: a)1 b)√2 c)2 d)√5 e)5.... Pergunta de ideia defernandalins21

fernandalins21 @fernandalins21

July 2022 1 17 Report

se a=√√5-1.√1+√5, então o valor de √a é: a)1 b)√2 c)2 d)√5 e)5

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3478elc

Verified answer

Produtos notaveis

a= (√5-1)(√1+√5)a=

a=(√5-1)(√5 + 1)

a= 5 - 1

a= 4

√a = √4 ==> 2

letra C

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