Question

dada a função f:->IR f(x)= 2x-3, entao f(-1)

Answer 1

f(x) = 2x-3

f(-1) = 2(-1) - 3
f(-1) = -2-3
f(-1) = -5

Answer 2

f(-1) = 2x - 3
        = 2 .( -1) - 3
        = -2 -3
        = -5