Question

DADA A FUNÇÃO F(x)=x²-x, calcule!!!

A) f(5)

B)f(-5)

C)f (؆2)

1
D) (—)
2

1
E) (—)
3

Answer 1

f(x) = x² - x

a) f(5) = 5² - 5
    f(5) = 25 - 5
    f(5) = 20. 

b) f(-5) = (-5)² -(-5)
    f(-5) = 25 + 5
    f(-5) = 30.

c) f(√2) = (√2)² - √2
c) f(√2) = 2 - √2

d) f(1/2) = (1/2)² - 1/2
d) f(1/2) = 1/4 - 1/2
d) f(1/2) = -1/4

e) f(1/3) = (1/3)² - 1/3
e) f(1/3) = 1/9 - 1/3
e) f(1/3) = -2/9.

Espero ter ajudado!