你怎么解决ln x ^ 2 = 4?

你怎么解决ln x ^ 2 = 4?
Anonim

回答:

#x in {-e ^ 2,e ^ 2}#

说明:

#LNX ^ 2 = 4#

#=> X ^ 2 = E ^ 4#

#=>的x ^ 2-E ^ 4 = 0#

比化,

#=>(X-E ^ 2)(X + E ^ 2)= 0#

有两个解决方案,

#=> x-e ^ 2 = 0 => x = e ^ 2#

和,

#=> X + E ^ 2 = 0 => X = -e ^ 2#