Ответ: .................................................................................................................
√f(x) < g(x) ⇔
f(x) ≥ 0
g(x) > 0
f(x) < g(x)²
-----
√(4 - 3x) < x + 2
4 - 3x ≥ 0
x + 2 > 0
4 - 3x < (x + 2)²
x ≤ 4/3
x > -2
4 - 3x < x² + 4x + 4
x² + 7x > 0
x(x + 7) > 0
++++++++++(-7) --------------- (0) ++++++++++
x ∈ (-∞, -7) U (0, +∞) пересекаем с x ≤ 4/3 x > -2
ответ x ∈ (0, 4/3]
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Verified answer
Ответ: .................................................................................................................
Verified answer
√f(x) < g(x) ⇔
f(x) ≥ 0
g(x) > 0
f(x) < g(x)²
-----
√(4 - 3x) < x + 2
4 - 3x ≥ 0
x + 2 > 0
4 - 3x < (x + 2)²
-----
x ≤ 4/3
x > -2
4 - 3x < x² + 4x + 4
x² + 7x > 0
x(x + 7) > 0
++++++++++(-7) --------------- (0) ++++++++++
x ∈ (-∞, -7) U (0, +∞) пересекаем с x ≤ 4/3 x > -2
ответ x ∈ (0, 4/3]