Question

urgenttttt dau coroana ​

Answer 1

Răspuns:

Explicație pas cu pas:

a) log(2; x) = log(2; 64/16)  =

   = log(2; 4) =log(2; 2^2) ,   x = 2

b) lgx = lg(1/8*1/1250 = lg1/1000,  x = 1/1000

c) log(2; x) =log(2; 3^2) - log(2; 5) =

  = log(2; 9/5)  ,  x = 9/5

d) log(3; x) = log(3; 4^2) - log(3; 7) log(3; 14) =

   =log(2; 16/7*14) = log(3; 32) ,  x = 32

e) log(7; x) = log(7; 4^2) -log(7; 2) + log(7; 5) =

   = log(7; 16/2*5)  = log(7; 40) ,   x = 40

etc.