Question

Los ejercicios ocho, nueve y diez:

Answer 1

log A = 2log 3 + 0,5log 4 - 3log 2

log A = log 3^2  +  log 4^(1/2) - log 2^3

log A = log (3^2 * 4^(1/2) / 2^3)

log A = log (9 * 2 / 8)

log A = log 9/4

      A = 9/4  



2,5^x  = 0,0087
log 2,5^x = log 0,0087
xlog 2,5 = log 0,0087
x = log 0,0087/log 2,5
x = -5,18

e^-x = 425
ln e^-x = ln 425
-xln e = ln 425
-x(1) = 6,05
  x = -6,05