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2014-05-18T21:16:06+03:00
A)3x+1≤0
3x≤-1
X≤-1/3
X∈(-α, -1/3]
B) -1/2≤3X+1
-3X≤1/2+1
-3X≤3/2    ·(-1)
X≥-3/6 SIMPLIFICAM
X≥-1/2
X∈[-1/2, +α)
S={-1/2, -1/3}
X∈[-1/2, -1/3]
1 5 1