Question

sendo A={-2,-1,0,1,2} e B=IR,escreva como um conjunto de pares ordenados

F:A --- B dada por y= 1+ 2x
f:A --- B dada por y= 2x+ x²

Answer 1

A = {-2, -1, 0, 1, 2}
f:A --> B, y = 1+2x
f(-2) = 1+2.(-2) = 1-4 = -3
f(-1) = 1+2.(-1) = 1-2 = -1
f(0) = 1+2.0 = 1+0 = 1
f(1) = 1+2.1 = 1+2 = 3
f(2) = 1+2.2 = 1+4 = 5
B = {(-2,-3), (-1,-1), (0,1), (1,3), (2,5)}
f:A -->B, y = 2x+x²
f(-2) = 2.(-2)+(-2)² = -4+4 = 0
f(-1) = 2.(-1)+(-1)² = -2+1 = -1
f(0) = 2.0 + 0² = 0+0 = 0
f(1) = 2.1+1² = 2+1 = 3
f(2) = 2.2+2² = 4+4 = 8
B = {(-2,0),(-1,-1),(0,0),(1,3),(2,8)}