Question

HELPP, MA POATE AJUTA SI PE MINE CINEVA CU ACEST TEST? *AM NEVOIE DE REZOLVARI COMPLETE*
DAU COROANA!!​

Answer 1

I

1)f(1)=3·1+5=8

f(-1)=3·(-1)+5=2

E=f(1)+f(-1)+2f(1)·f(-1)=8+2+2·8·2=8+32=40

2)f(x)=2x-7

abs=x ord=f(x)=y

f(x)=2x-7=-3

2x-7=-3

2x=4

x=2

3)f(x)=-3x+9

Ox∩Gf⇒y=f(x)=0

f(x)=-3x+9=0

-3x+9=0

-3x=-9

x=3⇒A(3:0)

4)f(x)=-x+3

f(a)=-a+3 f(a+1)=-(a+1)+3=-a-1+3=2-a f(a-4)=-(a-4)+3=-a+4+3=7-a

f(a)+f(a+1)+f(a-4)=0

a+3+2-a+7-a=0

12-a=0

-a=-12

a=12

5)f(x)=2x-14 f(x)=f(3)

f(3)=2·3-14=-8

f(x)=2x-14=-8 2x-14=-8 2x=6 x=3

6)