1) log5 (x-4)= log5 (12-5x) 2) log3 (x2 +3x -7)= 1 3) log7 4=log7 x-log7 9 4) 3log7(-1...

Question

1) log5 (x-4)= log5 (12-5x) 2) log3 (x2 +3x -7)= 1 3) log7 4=log7 x-log7 9 4) 3log7(-1 степень) x= log7(-1 степень) 9+ log7 (-1 степень) 3 5) lg (5x-4)= lg (1-x) 6) log0,6(x2 -3x -10)= 0

Answer 1

1)x-4=12-5x

x+5x=12+4

6x=16

x=16/6

 

2)x2+3x-7-3=0

x1=-5

x2=2

 

3)4=9x

x=4/9

 

5) 5x-4=1-x

6x=5

x=5/6