Question

1- construa o gráfico o das funções polinomiais do 1 grau :
A) y=3x+1
B) y= -2x+3
C) y= -3x
2 - dada a função f(x) = x3 +3x2 -2x -9 , o valor de f(2) -f(-3) é
A-3 B 2 C 3 D 7 E 10
​

Answer 1

Resposta:

Obs: Every calculation is solved by the value of x because y has the value of the question itself.

A) y=3x+1

Step 1: Flip the equation.

3x+1=y

Step 2: Add -1 to both sides.

3x+1+−1=y+−1

3x=y−1

Step 3: Divide both sides by 3.

3x/3=y−1/3

x=⅓ y+ −1/3

B) y= -2x+3

Step 1: Flip the equation.

−2x+3=y

Step 2: Add -3 to both sides.

−2x+3+−3=y+−3

−2x=y−3

Step 3: Divide both sides by -2.

−2x/−2=y−3/−2

x=−1/2 y+ 3/2

C) y= -3x

Step 1: Flip the equation.

−3x=y

Step 2: Divide both sides by -3.

−3x/−3=y/−3

x=−1/3 y

2 - dada a função f(x) = x3 +3x2 -2x -9 , o valor de f(2) -f(-3) é

A-3

B 2 ✓ the graph of the function ends up going through the number 2.

C 3

D 7

E 10

Gráfico:f(x) = x3 +3x2 -2x -9

Y=x³−2x−3↓