Question

3 si 4 . Va implor, imi trebuie urgent .Macar si un exercitiu .
Dau coroana caruia ma ajuta !!
Ajutoor!​

Answer 1

3)

a) A(-1,1)€Gf=>f(-1)=1=> (m-1)×(-1)+2n+3=1

-m+1+2n+3=1

-m+2n=-3

B(2,4)€Gf=>(m-1)×2+2n+3=4

2m-2+2n+3=4

2m+2n=3

-m+2n=-3=>2n=-3+m

2m+2n=3=>2n=3-2m

=>-3+m=3-2m

3m=6

m=2

2n=3-2m

2n=3-2×2

2n=3-4

2n=-1

n=-1:2

n=-0,5

b)desen

4)

a)A€Gf=>f(5)=6=>a×5+b=6=>b=6-5a

B€Gf=>f(5:3)=4=>a×5:3+b=4=>b=4-5a:3

6-5a=4-5a:3

18-15a=12-5a

6=10a

6:10=a

0,6=a

b=6-5×a

b=6-5×0,6

b=6-3,0

b=3

b)ox€Gf=>f(x)=y=0=>0,6×x+3=0

0,6×x=-3

x=-5=>C(-5,0)

oy€Gf=>f(0)=y=>0,6×0+3=y

0+3=y

3=y=>D(0,3)

(desen)

c)ox perpenducular pe oy=>triunghiul ODC dreptunghic in O

OC=|xC|=|-5|=5

OD=|yD|=|3|=3

=>aria triunghi = OC×OD:2=3×5:2=15:2=7,5 cm²

Sper că te-am ajutat❤