Question

Calculati suma elementelor multimii A={x∈ R l ( x-1 )² = 3 }

Answer 1

(x-1)la a 2= 3
x la 2= 3 +1
x=4 supra 2
x =2

Answer 2

A={x∈ R l ( x-1 )² = 3 }( x-1 )² = 3/ ·√x-1 = +√3/ +1
x= 1+√3

x-1=-√3 / +1
x=1-√3

A = { 1-√3 ;1+√3}