Question

seja F: R->R definida por f(x)=x^2-5x+4. calcule:
a)f(1)
b)f(2)
c)f(2p)

Answer 1

Substituindo.

a)

f(1) = 1² - 5*1 + 4
f(1) = 1 - 1
f(1) = 0

f(2) = 2² - 5*2 + 4
f(2) = 8 - 10
f(2) = -2

f(2p) = (2p)² - 5*2p + 4
f(2p) = 4p² - 10p + 4