Question

Cum se calculeaza exercitiu 13
Urgent repede imi trebuie foarte urgent

Answer 1

A) 
vx=2 => x=4
vx=3 => x=9
vx=4 => x=16   Deci A={4,9,16}

B)
-3 = -vx =>x=9
-2 = -vx => x=4
-1 = -vx => x=1
Deci B={1,4,9}

C)  impartim prin 3
16<sau egal x^2 ,sau egal 36
4<sau egal x <sau egal 6
C={4,5,6}
d) 24 <sau egal x^2 <sau egal 49
x= + sau - v25 =-5 si 5
x= +sau - v36 =-6 si 6
x=+ sau - v49 = -7 si 7
D={-7, -6,-5 5,6,7}