Bagaimana anda menyelesaikan ln (x + 12) - ln (x-2) = ln (x + 1) -ln (x + 11)?

Jawapan:

# "Tiada penyelesaian" #

Penjelasan:

# => ln (x + 12) + ln (x + 11) = ln (x-2) + ln (x + 1) #

# => ln ((x + 12) (x + 11)) = ln ((x-2) (x + 1)) #

# => ln (x ^ 2 + 23 x + 132) = ln (x ^ 2-x-2) #

# => batal (x ^ 2) + 23 x + 132 = batal (x ^ 2) - x - 2 #

# => 23 x + 132 = - x - 2 #

# => 24 x = -134 #

# => x = -134 / 24 #

# => x = -67 / 12 #

# => "Tiada penyelesaian seperti x mesti> 2 berada dalam domain semua ln (.)" #