Question

dada a funcao F(X)= -2x-4, faca o estudo da variacao do sinal paraF(X),0.

Answer 1

1) a > 0 crescente ==> -2x-4>0==>-2x>4(-1)==>2x< - 4==> x < -2

1) a = 0 constante ==> -2x-4=0 ==>-2x=4(-1)==>2x= - 4==> x = -2

1) a < 0 decrescente ==> -2x-4<0 ==>-2x<4(-1)==>2x> - 4==> x > -2