Question

Fie multimile :
A={x∈ N |2x-3≤9}
B={y ∈ N |y+2<8} si
C={z ∈ N |z= $3^{n}$ ,n ∈ N,n≤2}
a)Scrieti elementele multimilor A,B,C.


ajutoor

Answer 1

2x-3≤9
2x≤12
x≤6 => A = { 0 , 1 , 2 , 3 , 4 , 5 , 6 }
y+2<8
y<8-2
y<6 => B = { 0, 1 , 2 , 3 , 4 ,5 }
z =   ; n≤2
3 la puterea 0 , 3 la puterea 1 , 3 la puterea 2 = 1 , 3 , 9 => C = { 1 , 3 , 9 }