Question

considerando a funçao f(x)=x²+3 calcule:

a)f(0)=

b)f(-1)=

c)f(0) +2 f(-1) - f(5)=

Answer 1

f(x) = x² + 3

a)

f(0) = 0² + 3 = 0 + 3 = 3

b)

f(-1) = (-1)² + 3 = 1 + 3 = 4

c)

f(0) + 2.f(-1) - f(5) =

f(0) = 0² + 3 = 0 + 3 = 3

f(-1) = (-1)² + 3 = 1 + 3 = 4

f(5) = 5² + 3 = 25 + 3 = 28

f(0) + 2.(f-1) - f(5) = 3 + 2.4 - 28 = -17