Question

6- considere a função do 1 grau f (x)=
-3x+2. Determine
a) F(x)=11
b) F (-1)​

Answer 1

$a)\\\\11~=\,-3x+2\\\\3x+11~=~2\\\\3x~=~2-11\\\\3x~=~-9\\\\x~=\,-\dfrac{9}{3}\\\\\boxed{x~=\,-3}\\\\\\b)\\\\Substituindo~x~por\,-1~na~funcao:\\\\f(-1)~=\,-3\cdot(-1)+2\\\\f(-1)~=~3+2\\\\\boxed{f(-1)~=~5}$