Răspuns:
Explicație pas cu pas:
b)
f(x) = x
g(x) = -2x
f(x) ≤ g(x)
x ≤ -2x
x + 2x ≤ 0
3x ≤ 0
x ≤ 0
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c)
f(x) = x + 1
g(x) = 3
x + 1 ≤ 3
x ≤ 3-1
x≤ 2
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e)
f(x) = x/2
x/2 ≤ -2x
x/2 + 2x ≤ 0
5x/2 ≤ 0
