Question

Dada a função f(x)= 2x + 5 -x determine

F(-2)
F(-5)
F(3)
F(10)

Answer 1

f(-2)= 2(-2) + 5 -(-2)=
f(-2)= -4 + 5 + 2=
f(-2)= 3

f(-5)= 2(-5) + 5 -(-5)=
f(-5)= -10 + 5 + 5=
f(-5)=0

f(3)= 2×3 + 5 - 3=
f(3)= 6 + 2
f(3)= 8

f(10)= 2×10 + 5 - 10=
f(10)=20 - 5=
f(10)=15