Question

1. M apartine Gf
f:R-->R
f(x)=-6x+9
M(a;b)
a=b
VA ROG SA MA AJUTATI LA TOATE ACESTE EXERCITII
2. D(-6;-5) apartine Gf
f:R-->R
f(x)=x-3


3. f:R-->R
f(x)=x-6
f(k)=-8


4. Determinati un punct ce apartine f:R-->R
f(x)=7x+7
Care are coordonatele egale.



5. Determinati un punct ce apartine graficului functiei f:R-->R
f(x)=-5x-11
Care are coordonatele opuse.



DAU FUNDA
VA ROG SA MA AJUTATI LA TOATE

Answer 1

1.M€Gf
a=b
f(a)=-6a+9=b=a
-6a-a=-8
-7a=-8
a=8/7
2.f(-6)=-5€Gf
f(-6)=-6-3=-9deci punctul nu € graficului
3.f(x)=x-6
f(k)=k-6=-8
k=-2
4.f(x)=7x+7
M(x,y)
x=y
7x+7=y=x
7x-x=-7
6x=-7
x=-7/6
M(-7/6,-7/6)
5.f(x)=-5x-11
N(x,y)
x=-x
y=-x
-5x-11=-x
5x-x=-11
4x=-11
x=-11/4
N(-11/4,11/4)
verif:
55/4-11=55-44/4=11/4