Question

frac{1}{2x-1} ≥0 ma puteti ajuta?

Answer 1

fractia ≥ 0 
daca 2x-1 ≥ 0 
2x ≥ 1 
x≥ 1/2   in multimea numerelor reale x∈ [ -1/2 , +∞ )

Answer 2

$\frac{1}{2x-1}$≥0
2x-1≠0⇒x≠$\frac{1}{2}$
$\frac{1}{2x-1}$≥0
1≥0 adevarat pentru orice x
2x-1≥0
2x≥1
x≥$\frac{1}{2}$
dar x≠1/2 ca o conditie esentiala de existenta a fractiei=>x∈($\frac{1}{2}$,+∞)