Question

Desenvolva a resolução da equaçao

A) Log 3 ( 2x-1)=4

B) Log 2 (-x*2+6x)=3

Answer 1

Log 3 ( 2x-1)=4

2x-1 = 3⁴

2x = 82

x= 41 <===®

Log 2 (-x*2+6x)=3

-x²+6x = 2³

-x² +6x -8 = 0 ==> *(-1)

x² -6x +8 = 0 => b/c= -6/8= -2-4/-2•-4

(x -2). (x -4)= 0

x'=2. x"=4 <=====©