Odpowiedź:
Szczegółowe wyjaśnienie:
1.
α/360 · 2πr = 0,3 · 2πr | : 2πr
a/360 = 3/10
10α = 1080°
α = 108°
2.
Δ = 0 -4 · 2 · -8 = 64
√Δ = 8
x1 = 0-8/4 = -2
x2 = 8/4 = 2
3.
f(x) = x² + 8x + 16 - 9 = x² + 8x + 7
Δ = 64 - 4 · 1 · 7 = 64 - 28 = 36
√Δ = 6
x1 = (-8 - 6) / 2 = -7
x2 = (-8 + 6) / 2 = -1
p (oś symetrii) = -8/2 = -4
4.
p = 1/2
Δ = 1 - 4 · 1 · 6 = -23
q = 23/4
f(x) = (x-1/2)² + 23/4
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Odpowiedź:
Szczegółowe wyjaśnienie:
1.
α/360 · 2πr = 0,3 · 2πr | : 2πr
a/360 = 3/10
10α = 1080°
α = 108°
2.
Δ = 0 -4 · 2 · -8 = 64
√Δ = 8
x1 = 0-8/4 = -2
x2 = 8/4 = 2
3.
f(x) = x² + 8x + 16 - 9 = x² + 8x + 7
Δ = 64 - 4 · 1 · 7 = 64 - 28 = 36
√Δ = 6
x1 = (-8 - 6) / 2 = -7
x2 = (-8 + 6) / 2 = -1
p (oś symetrii) = -8/2 = -4
4.
p = 1/2
Δ = 1 - 4 · 1 · 6 = -23
q = 23/4
f(x) = (x-1/2)² + 23/4