Question

dada a função R de R tal que f(x)=3x²+x-1.
calcule f(1/2)

Answer 1

f(1/2) 3(1/2)^2+(1/2)-1=>
f(1/2) 3*1/4+1/2-1=>
f(1/2) 3/4+1/2-1=>
f(1/2) 3+2-1/4=>
f(1/2) 4/4=> 1
espero ter ajudado