Odpowiedź:
f(x) = - 1/2x - 2
- 1/2x - 2 < 0
- 1/2x < 2
1/2x > - 2
x > - 2 : 1/2
x > - 2 * 2
x > - 4
x ∈ ( - 4 , + ∞ )
f(12) = - 1/2 * 12 - 2 = - 6 - 2 = - 8
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Odpowiedź:
f(x) = - 1/2x - 2
- 1/2x - 2 < 0
- 1/2x < 2
1/2x > - 2
x > - 2 : 1/2
x > - 2 * 2
x > - 4
x ∈ ( - 4 , + ∞ )
f(12) = - 1/2 * 12 - 2 = - 6 - 2 = - 8