rozwiąż nierówność
x2-14x+24>0
rozwiąż równanie
x3-3x2+2x-6=0
proszę rozwiążcie mi to mam na jutro rano
x²-14x+24>0
Δ= b² - 4ac = (-14)² - 4*1*24 = 196 – 96= 100
√Δ = √100 = 10
x₁ = (-b-√Δ)/2a = (14-10)/2 = 4/2 = 2
x₂ = (-b+√Δ)/2a = (14+10)/2 =24/2 = 12
x € (-∞, 2) U (12, +∞)
x³-3x²+2x-6=0
x²(x -3) + 2(x-3) = 0
(x² +2) (x-3) = 0
x-3 = 0
x = 3
lub
x² + 2 = 0
∆ = b² - 4ac = -4 *2 = -8
nie ma pierwiastków
b)x³-3x²+2x-6=0
x²(x -3)+2(x-3)=0
(x² +2)(x-3)=0
x-3=0
x=3
x²+2=0
∆=b²-4ac=
-4·2=-8
bez pierwiastków
a)
Δ=b²-4ac=
(-14)²-4·1·24
=196–96
=100
√Δ=√100=10
x1=(-b-√Δ)/2a
=(14-10)/2=
4/2= 2
x2=(-b+√Δ)/2a
=(14+10)/2
=24/2
=12
czyli x∈(-∞,2)
U(12,+∞)
proszę :)
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rozwiąż nierówność
x²-14x+24>0
Δ= b² - 4ac = (-14)² - 4*1*24 = 196 – 96= 100
√Δ = √100 = 10
x₁ = (-b-√Δ)/2a = (14-10)/2 = 4/2 = 2
x₂ = (-b+√Δ)/2a = (14+10)/2 =24/2 = 12
x € (-∞, 2) U (12, +∞)
rozwiąż równanie
x³-3x²+2x-6=0
x²(x -3) + 2(x-3) = 0
(x² +2) (x-3) = 0
x-3 = 0
x = 3
lub
x² + 2 = 0
∆ = b² - 4ac = -4 *2 = -8
nie ma pierwiastków
b)x³-3x²+2x-6=0
x²(x -3)+2(x-3)=0
(x² +2)(x-3)=0
x-3=0
x=3
lub
x²+2=0
∆=b²-4ac=
-4·2=-8
bez pierwiastków
a)
x²-14x+24>0
Δ=b²-4ac=
(-14)²-4·1·24
=196–96
=100
√Δ=√100=10
x1=(-b-√Δ)/2a
=(14-10)/2=
4/2= 2
x2=(-b+√Δ)/2a
=(14+10)/2
=24/2
=12
czyli x∈(-∞,2)
U(12,+∞)
proszę :)