Question

Na função F:R-R, com F(x)=x-3x+1, determine.
A) F(-2)
B) F(1 em cima e 2 em baixo)

Answer 1

Olá Thayana!

F(x) = x -3x + 1

A)
f(-2) = -2 -3(-2) + 1
f(-2) = -2 + 6 + 1
f(-2) = -2 + 7
f(-2) = 5

B)
f(1/2) = 1/2 - 3(1/2)+ 1
f(1/2) = 1/2 - 3/2 + 1
mmc = 2
f(1/2) = (1 - 3 + 2.(1)) /2
f(1/2) = -2 + 2/2
f(1/2) = 0/2
f(1/2) = 0