Question

Seja f(x) = 3x +4. O valor de f(1) + f(2) + f(3) é:
010
20
30
040
050

Answer 1

f(x) = 3x + 4

f(1) = 3 . 1 + 4

f(1) = 3 + 4

f(1) = 7

f(2) = 3 . 2 + 4

f(2) = 6 + 4

f(2) = 10

f(3) = 3 . 3 + 4

f(3) = 9 + 4

f(3) = 13

f(1) + f(2) + f(3) = 7 + 10 + 13 = 30