Question

Precizeaza multimile de definitie ale ecuatilor:

a) x+1=2x, x apartine lui {1,2,3},
b) 2n+1=n-3, n apartine lui Q,
c) x+ y-1=0, x, y apartine lui N,
d) 2m=3+ m, m apartine lui R,

Answer 1

a) x+1=2x, x apartine lui {1,2,3} =

X12=123

b) 2n+1=n-3, n apartine lui Q=

Q21=3

c) x+ y-1=0, x, y apartine lui N

Nxy=10

d) 2m=3+ m, m apartine lui R=

R2m=3m