Question

Dtermine a raiz ou zero de cada uma das seguintes equações:
a) f(x) = 2x+5e
b) f(x) = -x+2
c)f(x) = 1/3x+3
d)f(x) = 1-5x
e) f(x) = 4x

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15 PONTOS

Answer 1

Considerando x=0
a) (0,5e) (-5e/2,0)
b) (0,2) (2,0)
c) (0,3) (0,-9)
d) (0,1) (1/5,0)
e) (0,0) (0,0)

Answer 2

$a)2x+5=0~~b)-x+2=0~~~~c) \frac{1}{3x} +3=0~~~~~d)1-5x=0~~~~e)4x=0 \\ 2x=-5~~~~~~~~~~~2=x~~~~~~~~~~~~~~~~~~9x=-1~~~~~~~~1=5x~~~~~~~~~~~~x= 0\\ x=- \frac{5}{2} ~~~~~~~~~~~~x=2~~~~~~~~~~~~~~~~~~~x=- \frac{1}{9} ~~~~~~~~~~~x= \frac{1}{5}$