prosze o zrobienie
zdanie 7
proste sa rownolegle gdy a1=a2
P=(-,4)
y=2/3x-5
a1=a2
a1=2/3=a2
y=ax+b
4=2/3*(-3)+b
4=-2+b
b=6
prosta rownolegla:
y=2/3x+6
zadanie 8
f(x)=2x+13
g(x)=-3x-7
a)
uklad rownan:
y=2x+13
y=-3x-7
2x+13=-3x-7
2x+3x=-7-13
5x=-20
x=-4
y=2*(-4)+13
y=-8+13
y=5
b)
f(x)>g(x)
2x+13>-3x-7
2x+3x>-7-13
5x>-20
x>-4
x∈(-4;+∞)
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zdanie 7
proste sa rownolegle gdy a1=a2
P=(-,4)
y=2/3x-5
a1=a2
a1=2/3=a2
y=ax+b
4=2/3*(-3)+b
4=-2+b
b=6
prosta rownolegla:
y=2/3x+6
zadanie 8
f(x)=2x+13
g(x)=-3x-7
a)
uklad rownan:
y=2x+13
y=-3x-7
2x+13=-3x-7
2x+3x=-7-13
5x=-20
x=-4
y=2x+13
y=2*(-4)+13
y=-8+13
y=5
x=-4
y=5
b)
f(x)>g(x)
2x+13>-3x-7
2x+3x>-7-13
5x>-20
x>-4
x∈(-4;+∞)
licze na naj