Question

Calculati sauma elementelor multimi A= {x apartine R | (x-1)²=4} Va rog mult!!!​

Answer 1

A= {x ∈ℝ | (x-1)²=4}

(x-1)²=4

x-1=±√4

x-1=±2

=> x-1=2

x=3

x-1=-2

x=-1

=> A={-1,3}

S=-1+3=2

Kawaiimath