Question

Scrieți toate perechile (a^2, a) , știind ca...

Answer 1

Răspuns:

a)

Multimea numerelor naturale:    N = {0, 1, 2, . . . , n, n + 1, . . . }

(16, 4)

(81, 9)

(400, 20)

b)

Multimea numerelor ıntregi  :

Z = {. . . , −n − 1, −n, . . . , −2, −1, 0, 1, 2, . . . , n, n + 1, . . . }

(25, 5)

(25. - 5)

(49, 7)

(49, - 7)

(144, 12)

(144, - 12)

c)

Multimea numerelor rationale  :

Q =  a/b ,  a, b ∈ Z,  b ≠ 0

(16/1 , 4/1)

(16/1, (-4/1) )

(81/1, 9/1 )

(81/1,  - 9/1)

(400/1,  -20/1)

(400/1,  20/1)

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