Ответ:
1) x² - 15x - 4² 2) log₁₀=(x=4 | x-3) = log ₁₀(8) 3) Не могу,
x² - 15x - 16 = 16 x + 4 | x - 3 = 8 но ответ
D = 15² - 4 * 1 * (-16)= x + 4 = 8(x - 3) 19|15
= 225 + 64 = 289 x + 4 = 8x - 24
x₁,₂= 15±17 | 2 x - 8x = -24 - 4
x₁ = -1 -7x = -28
x₂ = 16 x = 4
4) x - 2 < 3²
x - 2 < 9
x < 11 ==> x ∈ ( 2, 11)
5) 2-x ≤ 3x + 6 6) x-3 > 3⁰
-4x ≤ 4 x-3 > 1
x ≥ -1 ==> x ∈ [-1,2] x > 4 ==> x ∈ (4, +∞)
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Answers & Comments
Ответ:
1) x² - 15x - 4² 2) log₁₀=(x=4 | x-3) = log ₁₀(8) 3) Не могу,
x² - 15x - 16 = 16 x + 4 | x - 3 = 8 но ответ
D = 15² - 4 * 1 * (-16)= x + 4 = 8(x - 3) 19|15
= 225 + 64 = 289 x + 4 = 8x - 24
x₁,₂= 15±17 | 2 x - 8x = -24 - 4
x₁ = -1 -7x = -28
x₂ = 16 x = 4
4) x - 2 < 3²
x - 2 < 9
x < 11 ==> x ∈ ( 2, 11)
5) 2-x ≤ 3x + 6 6) x-3 > 3⁰
-4x ≤ 4 x-3 > 1
x ≥ -1 ==> x ∈ [-1,2] x > 4 ==> x ∈ (4, +∞)