Question

(UFPI)A função real com variável real,dada por f (x)=(3-2a)x +2,é crescente quanto:

a)a>

b)a <3/2

c)a=3/2

d)a>3/2

e)NDA​

Answer 1

$\boxed{\begin{array}{l}\rm(UFPI)~A~func_{\!\!,}\tilde ao~com~vari\acute avel~real,dada~por~\\\rm f(x)=(3-2a)x+2,\acute e~crescente~quando:\\\tt a)~\sf a>0\\\tt b)~\sf a<\dfrac{3}{2}\\\\\tt c)~\sf a=\dfrac{3}{2}\\\\\tt d)~\sf a>\dfrac{3}{2}\\\tt e)~\sf NDA\end{array}}$

$\large\boxed{\begin{array}{l}\underline{\rm soluc_{\!\!,}\tilde ao:}\\\sf 3-2a>0\\\sf -2a>-3\cdot(-1)\\\sf a<\dfrac{3}{2}\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~b}}}}\end{array}}$