Question

Exercitiile 6,7,8......​

Answer 1

Răspuns:

Banuiesc ca asta e a doua intrebare:

6. Fie f:r-r, f(x)=3x-5

x=2y

2y = 2(3x-5)=6x-10

3(6x-10)-5=0

3(6x-10)=5

18x-30=5

18x=35

x=35/18

7. Aici iti scriu doar coordonatele fiindca nu pot fac poza acum pe intuneric la grafic.

a)f(x)=x-5

GfUOX:F(x)=0

x=5

A(5.0)

GFUOY: y=f(0)

B(0.5)

b)f(x)=-2x-4

GfUox:f(x)=0

-2x=4

x=-2

A(-2.0)

GfUoy:f(0)=y

B(0.-4)

c)F(x)=√3x-1

gfUox:F(x)=0

√3x=1

x=1/√3

x=√3/3

A(√3/3.0)

GfUoy:y=f(0)

d)-6/5x-2=0

-6/5x=2

x=2/-6/5(Numai scriu gfUox... ca ia cam mult timp)

A(2/-6/5.0)

B(0.-2)

Ce inseamna tablouri de valori?

8)f:R->R, f(x)=x-1

x=1

A(1.0)

B(0.-1)

f:R->R, f(x)=-x+2

x=2

A(2.0)

B(0.2)