Advertisements
Advertisements
प्रश्न
Solve for x : log (x - 2) + log (x + 2) = log 5
उत्तर
log ( x - 2 ) + log ( x + 2 ) = log 5
⇒ log ( x - 2 ) ( x + 2) = log 5 ...[ loga m + loga n = loga mn ]
⇒ log ( x2 - 4 ) = log 5
⇒ x2 - 4 = 5
⇒ x 2 = 9
⇒ x = `+-sqrt9`
⇒ x = `+-sqrt(3^2)`
⇒ x = `+-`3
APPEARS IN
संबंधित प्रश्न
Express in terms of log 2 and log 3 : log 36
Express in terms of log 2 and log 3:
log 144
Express in terms of log 2 and log 3 : log 4.5
Evaluate the following without using tables :
log108 + log1025 + 2 log103 - log1018
Evaluate the following without using tables :
log 4 + `1/3` log 125 - `1/5`log 32
Solve for x : log (x2 - 21) = 2.
Solve for x :
`log 225/log15` = log x
State, true or false : log 1 x log 1000 = 0
State, true or false :
`log x/log y` = log x - log y
State, true or false :
If `log 25/log 5 = log x`, then x = 2.
