Question

Se f(x)=x*2 + 1/5, determine f(2/5).

Answer 1

f(x)=x^2+1/5
y=(2/5)^2+1/5
y=4/25+1/5
y=9/25

Answer 2

f(2/5) = (2/5)² + 1/5 
f(2/5) = 4/25 + 1/5
f(2/5) = 4+5/25
f(2/5) ⇒ 9/25 ou 0,36