Question

dada a função f(x) 2x²+x, determine:
a) f(2)
b (-2)​

Answer 1

Oie, Td Bom?!

• Seja a função: $f(x) = 2x {}^{2} + x$.

a)

$f(2) = 2 \: . \: 2 {}^{2} + 2$

$f(2) = 2 \: . \: 4 + 2$

$f(2) = 8 + 2$

$f(2) = 10$

b)

$f( -2 ) = 2 \: . \: ( - 2) {}^{2} + 2$

$f( - 2) = 2 \: . \: 2 {}^{2} + 2$

$f( - 2) = 2 \: . \: 4 + 2$

$f( - 2) = 8 + 2$

$f( - 2) = 10$

Att. Makaveli1996