Question

Esboce o grafico das seguintes funçoes

a) y= x2 + 2x+3,onde x = (-2,-1,0,1,2,3,4)

b)y=x2 - 5x+4, onde x=0, 5/2 (1,2,3,4,5)

Answer 1

Boa noite Noaldo

a) f(x) = x² + 2x + 3

f(-2) = 4 - 4 + 3 = 3
f(-1) = 1 - 2 + 3 = 2
f(0) = 3
f(1) = 1 + 2 + 3 = 6
f(2) = 4 + 4 + 3 = 11
f(3) = 9 + 6 + 3 = 18
f(4) = 16 + 8 + 3 = 27 

b) f(x) = x² - 5x + 4 

f(0) = 4
f(5/2) = 25/4 - 25/2 + 4 = -9/4 
f(1) = 1 - 5 + 4 = 0
f(2) = 4 - 10 + 4 = -2
f(3) = 9 - 15 + 4 = -2
f(4) = 16 - 20 + 4 = 0