Question

¿Cuántos subconjuntos tiene "a", si a = {  n / x  n; 2 < x < 15}?.

Answer 1

Respuesta:

4?................................

Answer 2

Respuesta:

A = (3;5)

2² = 4

Explicación:

A = {  √2x+1 ∈ N / x ∈ N; 2 < x < 15}

PIDE DE NUMEROS NATURALES:

√2(3)+1 = √7 = 2.64

√2(4)+1 = √9 = 3

√2(5)+1 = √11 = 3.31

√2(6)+1 = √13 = 3.60

√2(7)+1 = √15 = 3.87

√2(8)+1 = √17 = 4.12

√2(9)+1 = √19= 4.35

√2(10)+1 = √21 = 4.58

√2(11)+1 = √23 = 4.79

√2(12)+1 = √25 = 5

√2(13)+1 = √27 = 5.14

√2(14)+1 = √29 = 5.38