Question

Considerando a função f(x) = 5x ao quadrado + 6, com x E R e y E R, determine:

a) f(6/5)
b) f(v2)

Answer 1

a) 5.(6/5)^2 +6=5.36/25+6=6+6=12
b)5.2+6=10+6=16

Answer 2

$f(x)=5x^2+6\\ \\ f(\frac{6}{5})=5\cdot( \frac{6}{5} )^2+6=5\cdot \frac{36}{25} +6=\frac{36}{5} +6=\frac{36+30}{5}=\frac{66}{5}\\ \\ f( \sqrt{2})=5\cdot( \sqrt{2} )^2+6=5\cdot\sqrt{4}+6=5\cdot2+6=10+6=16$